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2025 Mammoth Fort Chaffee AAR

We had the opportunity to compete in the 2025 Mammoth Sniper Challenge at Fort Chaffee. The match director Chris Andrews commented that this might have been the toughest Mammoth yet due to constant rain day 1, heat on days 2 & 3, and rain & thunderstorms the third morning. The dropout rate was close to 50%. In the end only 44 of 80 finished the event. We were lucky to edge out a top 20 finish at 19th place and finished Mammoth our first time competing. Over three days we had 6 rucks totaling 29.7 miles with a sub 16 min/mile pace carrying about 60lbs worth of gear.

Below is a list of the gear and food I packed. To the food list I added (2) oatmeals and (3) mini–Cliff Bars. Last minute adds to the gear list were a lingerie laundry bag, Vaseline, and poncho. A grand $4.59 from Walmart in total. My teammate carried 50 rounds of 6.5CM ammo for me. After the event on the drive back we summarized our findings and those can be found at the end of this write-up.

Day 1
DescriptionWeightCostCalories
Breakfast & Coffee at Hotel0.000
Honey Stinger Waffles0.07150
GU Energy Gel0.07100
Liquid IV Hydration Multiplier0.0450
One Maple Glazed Doughnut0.13220
Mountain House Granola with Milk & Blueberries - 2 Servings0.25500
Liquid IV Hydration Multiplier0.0450
Country Archer Grass-Fed Beef Jerky 2.5oz0.17175
Honey Stinger Waffles0.07150
GU Energy Gel0.07100
Liquid IV Hydration Multiplier0.0450
Mountain House Beef Stroganoff - 2 Servings0.27560
Day 2
DescriptionWeightCostCalories
Mountain House Breakfast Skillet - 2 Servings0.23520
Kuju Coffee Basecamp Blend (x2)0.380
Honey Stinger Waffles0.07150
GU Energy Gel0.07100
Liquid IV Hydration Multiplier0.0450
One Maple Glazed Doughnut0.13220
PEAK REFUEL Strawberry Granola0.29530
Liquid IV Hydration Multiplier0.0450
Country Archer Grass-Fed Beef Jerky 2.5oz0.17175
Honey Stinger Waffles0.07150
GU Energy Gel0.07100
Liquid IV Hydration Multiplier0.0450
Mountain House Chicken and Dumplings - 2 Servings0.28600
Day 3
DescriptionWeightCostCalories
Mountain House Biscuits & Gravy - 2 Servings0.28560
Kuju Coffee Basecamp Blend (x2)0.380
Honey Stinger Waffles0.07150
GU Energy Gel0.07100
Liquid IV Hydration Multiplier0.0450
One Maple Glazed Doughnut0.13220
Backpackers Pantry Granola with Milk and Organic Blueberries0.29620
Liquid IV Hydration Multiplier0.0450
Country Archer Grass-Fed Beef Jerky 2.5oz0.17175
Honey Stinger Waffles0.07150
GU Energy Gel0.07100
Liquid IV Hydration Multiplier0.0450

Individual Gear
DescriptionWeightWeight ∆Notes
Kuiu Pro 3600 Pack4.74Removed Manual / Pad. Straps -0.27#
Eberlestock Bolt Action Scabbard1.06Remove Scabbard -1.06
Kuiu Mountain Star 2 Person Tent Set w/o bag3.34Alternate remove inner shell 0.88#. Footprint 0.295#
Kuiu Super Down Sleeping Bag 30deg1.64
Sea to Summit Aeros Premium Pillow0.17
Big Agnes Raptide SL Insulated Sleeping Pad (Long)1.36Alternate Nemo Switchback Sleeping Pad 14.5oz
Dry Bag0.65-0.65Not needed if dry
Black Diamond Cosmo 3500.18
Spexlite Shmedium Gamechanger w/ Clip0.79
Kestrel0.29
FHF Gear Bino Harness Pro-M & Armageddon Gear Mag Holder0.84
Sig Kilo 3000's2.14
UnderArmor dope card wristband0.100.285# Sunrise Tactical
Rite in rain pad0.21
Pen0.03
GCode Inner Belt0.30
GCode Paddle & OSH0.29
Glock G19 w/ RMR1.34Remove Flashlight (0.265#)
(x2) Magpul Glock G19 Mags0.21
AI ATX w/ 24" Proof CF Barrel + Dominus + Atlas Cal + Badger Ordnance 306-54 + TT525P16.00Ckyepod (+0.755#)
Sling + Adapter0.400.485# Larue
RRS TFCT-24L Mk2 SOAR® Series 2 Tripod4.66
SunShadow LLC Tac Table0.32
(x2) AX Mags0.68
100rds rifle5.10Steve carry 50rds for me
125rds Blazer Aluminum Case Pistol Ammo2.60Alternate 150 rounds 3.105#
Ear pro (x6 foam inserts)0.00HW Impact Sport (+0.79#)
Garmin Fenix 60.19
Fleece Beanie0.09-0.09Not needed if warm
Lightweight Beanie0.05-0.05
Hat0.14
GoRuck Mackall1.86
GoRuck Merino Challenge Socks - Crew (x2)0.35
Darn Tough Hiker Micro Crew Cushion Socks (x2)0.34
(x2) Champion Boxer Brief0.34
Kuiu Ultra Merino 120 LT Zip-Off0.35-0.35Bottom Base
(x2) Kuiu Peloton 118 LS Crew-T0.72Top Base
Kuiu Peloton 97 Fleece Zip-T0.31Midlayer
Patagonia Rain Jacket0.97Not needed if dry
KUIU Kutana Stretch Woven Pant0.85Outer
REI Co-Op Sahara Convertible Pants0.86Kuhl Radikl's 15.9oz
Eddie Bauer MR Jacket Cirrus Lite Down0.64-0.64
MSR Pocket Rocket 2 Stove w/o Carry Case0.16
Stove 4oz fuel Canister0.47
Toaks Titanium 750ml ml Pot0.28
Toaks Titanium Spork0.04
Halulite Aluminum Cup - 14 fl. oz0.16
Day 1 Food1.38
2105​
Calories
Day 2 Food1.85
2695​
Calories
Day 3 Food1.50
2225​
Calories
Degree Advanced Travel deodorant0.06
Travel toothbrush and toothpaste0.10
Dude Wipes 18 cnt0.33
Iphone0.48
Benchmade 535 Bugout0.12
Bodyglide0.09
Reflective Belt0.13
Lighter0.07
Extra Batteries (x3 AAA, AA, CR2, CR2032), Allen Keys (4mm, T15), & Lense Cloth0.14
BioLite Charge 40 PD Power Bank + Phone0.68
KT Tape Pro0.20
(x2) Contacts, Ibuprofen, Immodium, Pepto, Unisom, Olly Sleep0.16
Total Weight65.8264.04Alternate Total Weight
Total Ruck58.2456.46Alternate Total Ruck

Weight

I took out the alternates; dry bag and cold weather gear. I stepped off with a total weight of roughly 64# with 56.5# in my ruck

Round Count

130 Pistol & 150 Rifle

Day 1 Morning Ruck

5.4 miles, 16 minutes / miles, 86min 24sec

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Day 1 Stage 1 - Marathon House (5mins)

Primary Pistol: 8 / unlimited

Primary Rifle: 22 / unlimited

Secondary Pistol: 8 / unlimited

Secondary Rifle: 22 / unlimited

Pistol: 2 static torso targets must be engaged with 3 rounds hit or miss by each shooter. A marathon target will active and it must be neutralized with 2 hits from each shooter.

Rifle: Must setup over two red marks on the railing. Must find range and engage a 16” gong. 1st shooter 3 round hit or miss. 2nd short 3 rounds hit or miss. On the 6th round four Marathon targets will become active. Each Marathon target will require 2 hits to neutralize. The Marathon targets have red shirts.

All gear must be off the ground at the start. Move from start line, up the stairs, to the second story by the dump buckets & red tape to engage pistol and rifle.

Day 1 Stage 2 – Simultaneous Fire (5 mins)

Primary Rifle: 12

Secondary Rifle: 12

Rifle: There are 4 pairs of identical targets that are side by side. Targets must be engaged by shooters side by side and simultaneously for impacts to count. The order the targets must be engaged is found on a placard around 100 yards. 3 rounds per shooter hit or miss.

All gear must be off the ground at the start. Move with all gear from start line into the back of the Humvee to engage rifle from any position between the two red lines.

Day 1 Stage 3 – Marathon Pit & Prone (5 mins)

Primary Rifle: 18 / unlimited

Secondary Rifle: 18 / unlimited

Rifle: Secondary engaged a 12” Diamond at 493 yards with 3 rounds hit or miss. Primary engaged a 16” Diamond at 875 yards with 3 rounds hit or miss. The White Diamonds are in lanes 3 & 4. On the 6th round 3 marathon robots will become active. Marathon targets require 2 hits to drop. The marathon targets have white shirts.

All gear must be off the ground at the start. Move with all gear from start line into shooting positions. Secondary is prone on the ground left of the pit. The primary is on the forward wall of the pit standing.

Day 1 Stage 4 - Game On (5mins)

Primary Pistol: 12 rounds

Secondary Pistol: 12 rounds

Max Team Rifle: 35 rounds

Pistol: 4 prairie dogs, left to right, 3 rounds hit or miss

Rifle: 2 Coyotes, 1 Duck, 4 Wild Boar, any order, 3 rounds hit or miss. Only engaged by 1 shooter.

All gear must be off the ground at the start. Move from the start line to pistol dump buckets and engage pistol targets from the ground. Move into the UMTV with all gear to engage rifle targets from any position.

Day 1 Evening Ruck

5.4 miles, 16 minutes / miles, 86min 24sec

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Day 2 Morning Ruck

5.33 miles, 18 minutes / miles, 95 minutes 56 sec
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Day 2 Stage 5 – Auburn Road (5mins)

Primary Pistol: 9

Primary Rifle: 15 max

Secondary Pistol: 9

Secondary Rifle: 15 max

Pistol: First shooter engages 3 chest plate targets with 3 rounds hit or miss per target.Frist shooter move to the red post with dump bucket and abandons pistol. Second shooter repeats sequence.

Rifle: Secondary shooter is on the left and has four targets a clover, 3x15 rectange, square, and gong. Primary shooter is on the right and has four targets square, 3x15 rectangle, diamond, and oval. Both shooters engage a target with 3 rounds hit or miss. One shooter engages at a time. Once both shooters have engage each of their 4 targets, one shooter can engage a 18 x 28 rectangle at 758 yards with 3 rounds hit or miss.

All gear must be off the ground at the start. Move from the start line to pistol dump buckets and engage pistol targets from the ground. Build a position in between the two red posts and engage rifle targets.

Day 2 Stage 6 – The Hill (5mins)

Primary Pistol: 6

Primary Rifle: 9

Secondary Pistol: 6

Secondary Rifle: 9

Pistol: First shooter engages 2 torso targets in any order with 3 rounds hit or miss per target. Second shooter repeats sequence.

Rifle: Secondary has three targets less than 500 yards. (1) Torso, (1) Gong, (1) Square. Primary has three targets greater than 500 yards. (1) Torso, (1) Diamond, (1) Rectangle. Primary and secondary must engage targets with 3 rounds hit or miss. Only one target can be engaged at a time.

All gear must be off the ground at the start. Move from the start line to pistol dump buckets and engage pistol targets from the ground. Build a position in between the two red posts and engage rifle targets.

Day 2 Stage 7 – Tower (5mins)

Primary Pistol: 18

Primary Rifle: 9 / unlimited

Secondary Pistol: 18

Secondary Rifle: 9 / unlimited

Pistol: 6 Pistol IPSC targets must be engaged from left to right by the first shooter. There must be at least one mag change per shooter on pistol. 3 rounds hit or miss per target. Second shooter repeats sequence.

Rifle: P1, S1, P2, S2, P3, S3 Poppers. 3 impacts per popper to neutralize. Primary engages P1, P2, P3. Secondary engages S1, S2, S3. They must be engaged in sequence order.

All gear must be off the ground at the start. Move from the start line to pistol dump buckets and engage pistol targets from the ground. Move the stairs with all gear into the tower and engage the rifle targets.

Day 2 Stage 8 – Shapes (5mins)

Primary Rifle: 18

Secondary Rifle: 18

Rifle: (1) 12” Diamond, (1) Large Oval, (1) Wild Board, (1) 10” Square, (1) 10” Gong, and (1) Rubber Duck. Per target 1st Shooter 3 rounds hit or miss then 2nd Shoorts 3 rounds hit or miss. Targets can be engaged in any order.

All gear must be off the ground at the start. Move from the start line, through the woods to a vertical pallet anchored with 2 red posts. Shooting position is over the pallet between the two red posts.

Day 2 Evening Ruck

4.92 miles, 18 minutes / miles, 88 minutes 34 sec

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Day 3 Morning Ruck

4.33 miles, 16 minutes / miles, 69 minutes 17 sec

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Day 3 Stage 9 – Standing Offhand (3mins)

Primary Rifle: 10

Secondary Rifle: 10

Rifle: (1) 66% Torso. Left shooter engages the torso offhand with 5 rounds. Right shooter engages torso offhand with 5 rounds. Repeat for both shooters. Slings are allowed. All unneeded gear can remain in staging area. Bino harness can’t be used for support.

Gear must be off the ground at the start. Move from the start line, up the berm to the shooting position.

Day 3 Stage 10 – Pistols (3mins)

Primary Pistol: 10

Secondary Pistol: 10

Pistol: Left shooter engages torso target with 5 rounds standing with any gear used for support. Left shooter engages torso target with 5 rounds standing with no gear used for support. Right shooter repeats sequence.

Day 3 Stage 11 – Cant’ed (3mins)

Primary Rifle: 5

Secondary Rifle: 5

Rifle: Red 12” gong at 455 yards. Rifle must be cant’ed 90 degreed to engage.

Day 3 Evening Ruck (Final Ruck)

4.33 miles, 16 minutes / miles, 69 minutes 17 sec

IMG_9114.png


Actual Round Count

Pistol 76 & Rifle 97

Failures

My Kuiu Pro 3600 had a tear in the side at the seam and the load straps were frayed, pretty significantly, from rubbing on the frame. The load strap damage is from improper use feeding them through the frame. Kuiu was gracious enough to get in the mail a new harness and a store credit for my bag with a tear. My headlight, Black Diamond Cosmo 350, died Friday night and REI replaced it without a receipt. My Patagonia rain jacket had a failed zipper and it is enroute to Patagonia for repairs.

Not Recommended

I wore the GoRuck Mackalls and would not recommend them for 3 days and 30 miles. I would go with a mid-boot. I had 3 blisters and 2 hot spots. Taping my feet made one of the blisters worse. I read “Fixing your Feet” prior to the event but had little to no experience with hot spots and blisters during training.

Changes in Kit by Discovery Day

Day 1

  • With my headlamp failing I wish I had packed a backup headlamp. Having to use your phone for everything sucks.
  • I would add medium weight poncho for if your rain jacket jacket fails, to cover both shooters, or to cover your bag
  • My sharpie and ball point pen did not do well in the rain. I would add a Rite in Rain Pen
  • I would add a rifle rain cover to protect my rifle & optic from the elements.
Day 2

  • Add Small mat to sit / kneel on to save your legs, knees, and feet.
  • Add Small lightweight chair to save your legs, knees, and feet.
  • Add Lightweight Sandals to let your feet air out
  • Add Ranger Shorts to ruck in or sit around camp in
Day 3

  • I would take more food. Probably an additional meal per day. Between active and resting calories we burned approximately 4200, 4000, and 3400 respectively per day. I only packed on average 2350 calories per day
  • A medium weight tarp to wrap all your gear in when it’s raining
  • Change to a tent that has more height and is easier to setup. Right now I have 8 stakes and 3 poles. Some of the lightweight hunting tents I am looking at have 4 stakes and a single pole. Our tent did very well keeping us dry. The tent never lost a stake or came off the ground with the storms. I would recommend an insert (bottom or tub) with the tent to keep water out
  • I packed 4 pairs of socks and 2 pairs of underwear. I would pack 6 pairs of socks and 3 underwear.
  • I packed 3 shirts and 2 pants. I would pack 2 shirts and one pair of pants.
  • Multiple sleep aids did not work as well; Olly Gummies, Unisome, Advil PM, and Ashwaganda. The only thing that worked was NyQuil.
  • More Ibuprofen / Advil. We didn’t have enough. I think I had 8 per day.
  • Instead of foam inserts for ear pro pack something like Surefire Sonic Defenders.
  • Nalgene for carrying premade coffee, oatmeal, or ramen. We had to use the provided plastic water bottles.
  • Paracord for a clothes line to dry out clothes or fix failed backpacks.
  • Add Ramen noodles & oatmeal to the food list.
  • Lightweight dry bags to stuff items like a sleeping bag, pillow, clothes, ammo, etc.
  • Another option instead of tarp, gun condom, etc. would be a pack cover
  • A lot of guys were taking Pre workout before the rucks and it seemed to work out well
Closing Thoughts

I rucked twice a week, probably 3-4 miles average per ruck with final pack weight, and never rucked further than 6.5 miles. I did this for about 4 months leading up to the event. I ran and did bootcamps other days of the week. I felt confident going into the event. In hindsight, I wish I had rucked twice a day for 3-4 miles each ruck a couple weeks or month leaidng up to the event to get my feet and body conditioned to that level of load and demand. I also wish I had done more running interval training with pack weight. My teammate did this and fared better than me on the final ruck.

I severely underestimate calorie consumption and wish I had packed more food. It’s hard to explain, but you are constantly moving. Either rucking, packing, unpacking, shooting, setting up camp, packing up camp, cooking, etc. It’s a gear management marathon. You are just constantly moving. There were a few times a day I could lay down in the shade, hopefully under a tree, but those were in the minority by far. Any time you can get off your feet either on a mat, chair, or shooting bag it needs to be done.

There is something about being out in the elements for three full days that just zaps you mentally and physically. We had about six hours of rain on Friday and everything got soaked. It wasn’t particularly cold, 60degF – ish, but people were shaking they were so cold. I made the mistake of changing my socks immediately after the first ruck and the new pair got soaked with the rain. I was already down 2 pairs of socks, and it wasn’t even 9am the first day of the event. We spent the majority of the first day in the rain. It didn’t really stop until early afternoon, allowing us to dry up before the final ruck. I don’t think I was dry until like 3-4pm. The heat on days 2 and 3 just drained me. I did well with a hat, long sleeves, and long pants, but still it’ll just zap you and I am from the Southeast and accustomed to the heat. It wasn’t particularly hot either, in the mid 80’s.

Another thing I didn’t expect was sleep deprivation. We didn’t get back to camp on the first day until like 6:30. Setting up camp, cooking, drying clothes out, setting out clothes for the following day, inventorying, etc. it was close to 9 before we got in bed. With an early rise all morning of 4am-4:30am

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Accessories Seekonk 3/8 T handle torque wrench

I purchased it a while back and was going to use it for my XM3 kit but realized it was the incorrect one. I believe this one is what they considered a ratcheting model. It is 3/8 and I do not remember what it was set for. I know you can send it back and have it adjusted to what inch pound you want.

Looking for $50 shipped to lower 48
Prefer PayPal friends and family
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Issues with Kidd Build

over the past year i have collected parts and built a full kidd 22, (no stock parts left) bedded in a boyds pro varmint. i went a real roundabout way, replacing parts as i could rather than buying a barreled action. My issue now is feeding; i have tried half a dozen types of ammo, new mags, old mags, all three recoil springs, and i am still having feed issues. is there anything i can do or do i contact Kidd?

It struggles to feed the first round and shaves bullets almost every time. This not only causes feed issues, but super inconsistent groups past 25 yards. I think it is clearly an alignment issue, but not sure how it happened. Seems like the feed angle is too steep.

Have tried Wolf match extra, SK Pistol match, SK Rifle match, cci green tag, aguila gold eagle match, and some bulk box ammo. It doesn't really seem to matter what i use, it all struggles to seat the first round all the way to battery and then chokes eventually. everything seems to eject fine, but the feed is killing me.

Accessories For sale: Desert Tech SRS-A2 Carbon fiber rail

For sale is my custom Desert Tech SRS-A2 carbon fiber rail. Can accept integral suppressors with a 1.5” OD
$250 each
I have tons of them available.
They are 3.5-4 oz lighter than OEM, (you can feel the deference free shooting the rifle)
Much more sturdy, very little play when weight is put on the barrel pushing down. (increasing off the bipod accuracy in my testing)
Much nicer to hold, especially when it is cold.



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SOLD SOLD - Walsh Custom Defense XM kydex mag holsters w/ tek-lok

I have a brand new pair of Walsh Custom Defense mag holsters. These were custom made to fit MDT's XM mag. They have Tek-Lok clips installed.

I ended up going a different route with the build and will no longer need these.

They are OD Green carbon fiber

$50 for 1
$90 for both.

Prices are shipped.

No trades at this time please. Thank you.

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338 Lapua Magnum

pyrofx
pyrofx.jpg

XSergeant
Rating: 3.0/5 this site
388 posts this site
>338 Lapua Magnum
10/08/2014
(1 vote)

Just tried the reloader 33 powder in the 338 . 99.0 gr
Kreiger 9.3 x27
fed 215mag
hornydaddy 285
2789 es of 6 with hornydaddy brass. bolt lifts fine untill the cam over . then it takes a bit of a nudge.
2796 es of 14with Lapua brass . effortless bolt lift .
both loads shot at 80 degrees, and at 400 yards with 12mph wind from 3.
they both kept 1" vert . last 5 shot group was 2.125" All at 400 yards

Greg
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ChrisGarrettHPBT
ChrisGarrettHPBT.jpg

XFirst Sergeant
Rating: 3.3/5 this site
2214 posts this site
Re: >338 Lapua Magnum
10/09/2014

Sako TRG-42 338LM 1:12" twist, so this is for the 250s.

Go-to powders are VV-165, VV-170, H-4831sc and H-1000.

I bought an 8# jug of H-4831sc and have used that a lot.

Pet load is H-4831sc at between 88gr-89gr under 250gr Scenars, LockBase, Berger OTMs and SMKs, for about 2875-2950ish fps depending on Miami temps. It's not a stiff load, but it's not a cream-puff load, either.

For the Berger 250gr pre-production testing, I just split the difference at 88.5gr and played with seating depth, my rifle likes that node that much.

Looking back at my VV-165 loads with the 250s, anything from 84gr-87gr and just about 2800 fps. VV-170 at 93gr in my 27.125" barrel yielded 2825 fps.

For my limited testing with H-1000 and the 250s, 97gr got me 2974 fps, so well on my way to be above hot at 3000 fps.

The rifle is fairly accurate (I'm just a hack) out to the 1000 yds that I've shot at 4-5 times, so most of those combos are close to one another accuracy-wise.

Chris
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lashlaroe
lashlaroe.jpg

X52 MONTHS
Premium Member
First Sergeant
Rating: 3.5/5 this site
3294 posts this site
Re: >338 Lapua Magnum
11/16/2014

I must have missed this one or maybe it just got pinned. I'm getting ready to star loading .338 LM for the first time and will be starting with H1000 and hornady 285 bthp, because that's what I have right now.

Based on searches on the old Hide and other googlization, I've got my starting points and maxes set for first try, but am still interested in loads others have had success with.

As you know, loading manuals and other industry sources seem notoriously slow to add load information for newish products. Even Hornady doesn't list good loads for it's own 285s that have been out for years.
Rate now:
Diver160651
Diver160651.jpg

XFirst Sergeant
Rating: 3.6/5 this site
2158 posts this site
Re: >338 Lapua Magnum
11/19/2014 Last edited 12/08/2014 by Diver160651
(5 votes)

338 Lapua MAG 1-9 26”PowderGrainsPrimmerCOALOGIVERIFLE LANDSFPS
TRIM 2.723 COALOGIVE
285gr A-MAX HornadyH100092.5FLR-MAG3.7392.95253.7592.9722950

[IMG2=JSON]{"alt":"338 Lapua Magnum 285gr A-Max @2835fps","data-align":"none","data-size":"full","height":"180","width":"240","src":"https:\/\/farm9.staticflickr.com\/8117\/15557339127_6cd3ed56e5_m.jpg"}[/IMG2]
Rate now:
lashlaroe
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X52 MONTHS
Premium Member
First Sergeant
Rating: 3.5/5 this site
3294 posts this site
Re: >338 Lapua Magnum
11/20/2014

Thanks Diver. Just what the doctor ordered. I'll start low and work my way there.

Excellent group BTW! Impressive shooting and rifle.
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dTros
dTros.jpg

XFirst Sergeant
Rating: 3.3/5 this site
1379 posts this site
Re: >338 Lapua Magnum
11/25/2014

Stiller Tac338

22" Shilen Match Select

300gr SMK

92 gr H1000

Lapua Brass

215M Primer

2710 FPS



Regards,

DT

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KITTYCATMANX26 MONTHS
Premium Member
Corporal
Rating: 3.4/5 this site
49 posts this site
Re: >338 Lapua Magnum
11/27/2014

Plinking: 250gr Scenar or SMK, 86-88gr IMR 7828 (easy on the brass and bore)
Stout load: 300gr Scenar, 92gr Retumbo
Long Range: 267gr MTAC (single feed), 95gr H-1000 (still working up)
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DefenseLaw
DefenseLaw.jpg

XSergeant
Rating: 3.2/5 this site
293 posts this site
Re: >338 Lapua Magnum
12/03/2014

96 gr RL-33
Lapua Brass
215 GM
300 SMK, .02 off the lands.
32 inch Pac-Nor, 2936 FPS.
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vinsonrXGunny Sergeant
Rating: 3.1/5 this site
583 posts this site
Re: >338 Lapua Magnum
12/08/2014 Last edited 12/08/2014 by vinsonr

300gr Scenar

92gr H1000

Lapua Brass

215 primer

base to ogive: 2.95

2820 fps

26" 1:10 DTA SRS



A writeup I did while doing load devel for my 338: 338 Load Devel

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secondofangle1X27 MONTHS
Premium Member
Gunny Sergeant
Rating: 3.5/5 this site
503 posts this site
Re: >338 Lapua Magnum
12/23/2014 Last edited 09/24/2015 by secondofangle1

DTA SRS DT barrel 26"

lapua brass

fed 215m

92.0 retumbo

2745 with SD 6.0

300 grain Nosler cc

< 0.5 MOA 5 shot groups

ETA I'm getting a slight ejector mark, very faint, so I backed down to 91 grains. My barrel since it was broke in is faster, so 91 grains still gets me 2752 average velocity 5 shots, SD <10 FPS. Next I'm going down to 90 grains, just to be kind to the brass, just in case. To reiterate, this does not appear to be a HOT load, I'm backing down for brass life and an extra safety margin.

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epracmetconXSergeant
Rating: 3.1/5 this site
199 posts this site
Re: >338 Lapua Magnum
12/31/2014

AI AX338 27 inch barrel
Winchestor WLRM primers
94.0 GR of Retumbo
300 gr Berger OTM Hybrids
According to my DOPE, running around 2960fps
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captacademyXGunny Sergeant
Rating: 3.0/5 this site
831 posts this site
Re: >338 Lapua Magnum
01/12/2015

vinsonr wrote:
300gr Scenar

92gr H1000

Lapua Brass

215 primer

base to ogive: 2.95

2820 fps

26" 1:10 DTA SRS



A writeup I did while doing load devel for my 338: 338 Load Devel

What distance was your testing shot at 100 0r 300 yds?​
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reeldoc1XSergeant
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Re: >338 Lapua Magnum
01/16/2015

epracmetcon wrote: AI AX338 27 inch barrel
Winchestor WLRM primers
94.0 GR of Retumbo
300 gr Berger OTM Hybrids
According to my DOPE, running around 2960fps​
Distance off lands?

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reeldoc1XSergeant
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Re: >338 Lapua Magnum
01/23/2015

up for overall length info please

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epracmetconXSergeant
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Re: >338 Lapua Magnum
02/10/2015 Last edited 02/10/2015 by epracmetcon

reeldoc1 wrote:
epracmetcon wrote: AI AX338 27 inch barrel
Winchestor WLRM primers
94.0 GR of Retumbo
300 gr Berger OTM Hybrids
According to my DOPE, running around 2960fps​
Distance off lands?​
I'll have to measure when I get home. I am loading them to mag length, they are quite a ways off the lands. I would not recommend this load for everyone, it is just a touch over pressured.

EDIT: They are 3.784 COAL.
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rltw75
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XSergeant
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Re: >338 Lapua Magnum
02/21/2015

Looking for some input and your opinion on the Berger 338 OTM's.

I have H1000 and some 250's to load up. Been using scenars but wanted to give the Berger's a shot.

26". 1:9.4 Krieger. 1500 yards is max range available. My rifle likes bullet jump (.015).

Thanks

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cecchino76XFirst Sergeant
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Re: >338 Lapua Magnum
03/11/2015

secondofangle1 wrote:
DTA SRS DT barrel 26"

lapua brass

fed 215m

92.0 retumbo

2745 with SD 6.0

300 grain Nosler cc

< 0.5 MOA 5 shot groups

no pressure whatever​
What is your COAL or to the ogive length ?

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WolfCobraXSergeant
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Re: >338 Lapua Magnum
03/14/2015

I am currently making a MV of 2632 out of my 27" AI AXMC using Berger 300 OTMs and 87.4 grains of H1000. What kind of velocity jump should I expect if I bump it up to 89.5 grains of H1000? I'd like to get a little more out of my transonic range for shooting at a mile by shooting closer to 2700-2800, but started getting harder bolt lift at 90 grains with Hornady brass. Is it likely I could even push it a little further using Lapua brass?

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rltw75
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XSergeant
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Re: >338 Lapua Magnum
03/15/2015

WolfCobra wrote:
I am currently making a MV of 2632 out of my 27" AI AXMC using Berger 300 OTMs and 87.4 grains of H1000. What kind of velocity jump should I expect if I bump it up to 89.5 grains of H1000? I'd like to get a little more out of my transonic range for shooting at a mile by shooting closer to 2700-2800, but started getting harder bolt lift at 90 grains with Hornady brass. Is it likely I could even push it a little further using Lapua brass?

I am using both Lapua and Norma brass with Berger 300 OTM's.

26" Krieger with 92.0 of H1000 at 2800. My best nodes were between 91.5 and 92.0

I have settled on 91.8 (base to ogive @ 2.956), seated at 2.933 (.023" jump) with no pressure on brass or sticky bolt. Loaded at the absolute maximum magazine length (coal @ 3.788"). MV is 2788 over my V3.​


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secondofangle1X27 MONTHS
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Re: >338 Lapua Magnum
03/15/2015 Last edited 04/08/2015 by secondofangle1

cecchino76 wrote:
secondofangle1 wrote:
DTA SRS DT barrel 26"

lapua brass

fed 215m

92.0 retumbo

2745 with SD 6.0

300 grain Nosler cc

< 0.5 MOA 5 shot groups

no pressure whatever​
What is your COAL or to the ogive length ?​
B-ogive 2.971 which is about eleven thou off lands.

ETA I'm getting a slight ejector mark, very faint, so I backed down to 91 grains. My barrel since it was broke in is faster, so 91 grains still gets me 2752 average velocity 5 shots, SD <10 FPS. Next I'm going down to 90 grains, just to be kind to the brass, just in case. To reiterate, this does not appear to be a HOT load, I'm backing down for brass life and an extra safety margin.

SOLD Spikes Tactical Upper w/ optics

Spikes Tactical Upper. Has the 7 twist CHF Chrome lined barrel. Shoots good with 77smk handloads.

The hand guard is not a spikes Tactical handguard. Im not sure what brand it is.

Comes with Vortex Strike Eagle 1-8x24 and the mount. Also comes with Athlon TPS Prism Scope.
Comes with BCM grip.

675.00 shipped

PayPal FF Preferred

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SOLD Razor LHT 4.5-22 MRAD SPUHR TENEBRAEX

Vortex razor LHT 4.5-22-50 MRAD
SPUHR SCP3001 MOUNT Tenebaex caps throw lever/ vortex level sun shade all included xlr-2 reticle
$1250 shipped in original box

Would trade for a
matrix 700sa chassis
Cronus gen 2 MRAD
BARREL BLANKS

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Accessories WTS Geissele G2S-E Two Stage Enhanced Trigger NEW

Brand New In Package Geissele G2S-E Trigger. $150 Now $120 Shipped in CONUS. Part # 05-276 Bought for a build and didn't use it.
  • Two Stage for AR15 AR10
  • It uses a standard .154” trigger and hammer pin so it will fit in any Mil-Spec stripped lower receiver.
  • Smooth two stage 3.5 lb. trigger pull
  • The G2S-E was designed to be a high quality, cost effective alternative to the SSA-E.
  • The G2S-E is manufactured from the same tool steel as the SSA-E

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What upper receivers are you guys using to get a good thermal fit?

Until recently, my goto stripped upper receiver was the BCM blems. A while back, I ordered half a dozen of them. They all worked fine for various rigs and provided a good thermal fit. When I ran out, I ordered 3 more.

Of those 3, two were unusable. One was so tight that I couldn't even get the lapping jig in, much less the barrel, even with liberal use of a torch. Once I got things together, it shot like crap. Gotta imagine there was a whole lot of stress.

On the other, the charging handle, no matter which I used, kept reciprocating.

So, what else is being used to get a good thermal fit?

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