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208 AMAX 300Win Mag load recipies

J

Jack-O

Private
Minuteman
Mar 29, 2010
8
0
53
Montana
www.performanceammo.com
So, I have been searching thru the threads and found a few random things on this but nothing definitive.

I would like to compile a decent collection of user reports and proven formulas to see where we are on this load combo, since it is one of the best for the 300WM.

please give:
Powder type and weight
brass type and new or reloaded
trim length
primer
COAL
neck crimp or not
runout checked or no
FL sized or not
Accuracy results
Chrono data
What ranges did you check them at and how did they do as they got farther out?
any other special preps you might do like flash hole, belt sizing, neck turning etc.

I'd really like to see if there is one powder brass combo that shows the most promise. I've looked thru the manuals and run stuff thru quickload, but what I'm hoping to find is somthing like a proven formula for this bullet that does well across rifle platforms.

thanks for your help

Oh, and if anyone has tried ramshot magnum I'd like to hear about the results
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: colt933</div><div class="ubbcode-body">OK, I settled on the above load:

208 Amax jammed .010" into the lands
Win brass with minor prep
H1000 78.9gr
CCI magnum primers

median velocity 2874
extreme spread 21

5 shot groups average 1.5" at 200 yards
several 3 shot groups at 3/4" at 200 yards

It looks like this will still be supersonic at 1760 yards if I got the BC right - like I will ever have the chance to shoot at that distance.

All velocity numbers are with AAC 762-SD installed over an AAC brake. Group size with and without the can are identical but point of impact is about 2" low with can on at both 100 and 200 yards and is repeatable and is the same as POI shift on the .308 bolt gun. </div></div>
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jagged77</div><div class="ubbcode-body">
Using the data the Hornady kindly sent I worked up using IMR4831 finally settling on the max load as the best.

Specs as follows:

700P AICS stock
208gr AMAX
Remington Brass fl resized and prepped
CCI 250 mag primers
68.7 grains IMR4831
Based on drop at 300 / 500 I'm estimating around 2900 fps (although Hornady list this load around 2800 fps)
Bullet jammed .010" into lands

This bullet is incredibly slippery in the wind! Shot it yesterday in an F-Class comp and finished 2nd, no group photos to show unfortunately. </div></div>
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dominique</div><div class="ubbcode-body">Remington 700 Police 300 WM

26in factory barrel with vais brake
1-10 Twist

RP brass
Hornady 208 Amax
Fed 215 Match Large Magnum Primer
72.0grs of IMR 4831 at 2940 FPS
Trimed to 2.600
C.O.A.L 3.578
.25 MOA at 100
</div></div>
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Varmint Slayer</div><div class="ubbcode-body">208 Amax
WIN Brass
74.6 H1000
.015 off lands
CCI BR Primers

Its a little on the slow side but has worked well out to 1500 yards. Never checked FPS but is somewhere around 2800. </div></div>
 
Re: 208 AMAX 300Win Mag load recipies

72.9 r-22 with new hornady brass resized fl then trimmed to 2.610". Wlrm primers seated at 3.600" (long throat ) coal. With chrony at 12 ft I was hitting 2955 fps Max with a mean of 2930 after 10 shots which measured .432" Stick was a remington 700 police with a few upgrades.
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jack-O</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: colt933</div><div class="ubbcode-body">OK, I settled on the above load:

208 Amax jammed .010" into the lands
Win brass with minor prep
H1000 78.9gr
CCI magnum primers

median velocity 2874
extreme spread 21

5 shot groups average 1.5" at 200 yards
several 3 shot groups at 3/4" at 200 yards

It looks like this will still be supersonic at 1760 yards if I got the BC right - like I will ever have the chance to shoot at that distance.

All velocity numbers are with AAC 762-SD installed over an AAC brake. Group size with and without the can are identical but point of impact is about 2" low with can on at both 100 and 200 yards and is repeatable and is the same as POI shift on the .308 bolt gun. </div></div> </div></div>

This was my load, but I have changed it a bit - lowered the powder charge and reduced the COAL:
Win brass, full-length sized, 2-3 loadings, flash hole deburred
CCI 250
208 AMAX
78.5gr H1000
.030 off the lands
velocity 2900 through factory 700p
sub 3/4MOA - often 1/2MOA (at 200 yards, longest range I have)

This load is HOT, but not over pressure in my gun. YMMV. Work up. I got sub MOA with all weights between 78 and 79 gr, but the above load seems the most consistent.

Just bought the Larry Willis belted magnum die so hope to get lots of loadings from this brass.
 
Re: 208 AMAX 300Win Mag load recipies

73 grains RL-25
Nosler Custom .300 Winchester brass, well used but annealed every 3 firings
Chamber length is 2.655", I trim to 2.645"
WLRM primer
COAL is 3.611"
No crimp
Runout checked at .002" or less
smile.gif

.873" 5-shot group at 200 yards, 4" at 600 yards (wind)
Brass is fully prepped with flash holes, primer pockets, necks turned .002" neck tension
About 2850 fps
 
Re: 208 AMAX 300Win Mag load recipies

Remington 700 5-R milspec
76.0 Gr. of H-1000 (2890 average from 7 shots) 3 Shots = .498" @ 100yrds
208 A-MAX seated to 3.606" OAL in RWS brass
Federal 215M primer

IMG_3082.jpg

Velocities:
1. 2902
2. 2885
3. 2890
4. 2893
5. 2889
6. 2882
7. 2892
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dominique</div><div class="ubbcode-body">Try this: http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2366800&page=4 </div></div>

My first few posts are loads cherry picked from that thread. I went thru it and several other threads searching.

The purpose of this thread is to highlight the 208 AMAX loads only and update with subsequent development since the old thread, which is why I cross posted the original posts as a jumping off point.

Thanks for the effort tho, I know you meant well!!
laugh.gif
 
Re: 208 AMAX 300Win Mag load recipies

Here are some numbers that I came up with from last range trip and didnt really try for groups just numbers.

Remington 700 Sendero SF II 300 WM 26" BB

208 A-Max COAL 3.550: Win Brass 1x fired at 2.610: Powder H1000
Temp 87.8 Hum 27% Bar 29.850 Alt 151ft

76.0gr: 2846,2811,2832,2812
76.5gr: 2837,2865,2820,2816,2879
77.0gr: 2879,2848,2878

Same stuff as above but different powder Retumbo
Temp 89.6 Hum 25% Bar 29.850 Alt 151ft

79.0gr: 2927,2927,2923,2913,2945
79.5gr: 2952,2930,2974,2949,2939


I know for a fact that if I had some templac to anneal the brass with instead just by eye numbers would of been better. I will still be doing tests for this.




Aron-
 
Re: 208 AMAX 300Win Mag load recipies

I use 64.5 IMR4350, cci mag primers, can't remember COAL or brass type (I think 3.6 and rem brass). I want to say velocity was 2750 and accuracy was around 3/4". 4350 isn't everyone's first choice but I have a LOT of it and it worked well with 168's and 190's so...

Rifle is factory sendero.
 
Re: 208 AMAX 300Win Mag load recipies

Winchester Brass
CCI Magnum 250 Primers
Reloader 22: 71g
208 Amax 0.010 off the Jam

Bat Action
Krieger Barrel 1:10
Badger DBM
McMil Adj A3-5 Stock

Consistently shooting sub MOA out to 400yds
Consistently hitting 2870 FPS
 
Re: 208 AMAX 300Win Mag load recipies

Good thread topic, I was thinking of posting this same thing myself. I also am looking for a FGMM type load with 208 AMAX that seems to shoot in everything you put it in. I thought Southwest or one of the other re-loaders was going to start loading this but I haven't seen anything yet. I need to come up with a load for my 5R in 300WM with Win Brass and CCI 250 primers.
 
Re: 208 AMAX 300Win Mag load recipies

Those of you who have tested it at range please tell me how your loads hold up past 500 thru 1000+

Anyone shoot this projo/caliber combo past 1000? does the accuracy hold for your load?
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 5R milspec</div><div class="ubbcode-body">give or take 76gn's of h1000 seems to work really well for alot of us. </div></div>

Agreed!
Heres mine:
Heres my current load and speeds out of a bone stock 300 WM Sendero 26 inch .
Hornady cases,Neck sized for 4 firings then FL then neck for 4 and so on. Properly Annealed & trimmed & Chmfrd inside and out w/ Hornady 3 in 1 cutter, and Hornady ultra-sonicly cleaned after each use.
Fed 215
76.8 H-1000
208 Amax
3.608 OAL
~2988 Fps.

23.5 to 24 MOA to 1,000. Cuts the wind really good. Very happy with the A-Max and H1000
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jack-O</div><div class="ubbcode-body">Those of you who have tested it at range please tell me how your loads hold up past 500 thru 1000+

Anyone shoot this projo/caliber combo past 1000? does the accuracy hold for your load?</div></div>

I stretch them out to 1400 yards pretty regularly and they have been pretty good so far. I have shot them on a dead calm day and produced .75 to 1 MOA, 5 shot groups and have shot them in 5-15 MPH winds and still produced more hits than misses. They buck the wind pretty good really.

My load:

74.6 H1000
WIN brass fired 6 times, one trim, FL sized every time
CCI 250 primers
2.860 ogive sitting .030 off lands
No other case prep done or run out checked.
2870 FPS out of 28 inch Savage 110
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Varmint Slayer</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jack-O</div><div class="ubbcode-body">Those of you who have tested it at range please tell me how your loads hold up past 500 thru 1000+

Anyone shoot this projo/caliber combo past 1000? does the accuracy hold for your load?</div></div>

I stretch them out to 1400 yards pretty regularly and they have been pretty good so far. I have shot them on a dead calm day and produced .75 to 1 MOA, 5 shot groups and have shot them in 5-15 MPH winds and still produced more hits than misses. They buck the wind pretty good really.

My load:

74.6 H1000
WIN brass fired 6 times, one trim, FL sized every time
CCI 250 primers
2.860 ogive sitting .030 off lands
No other case prep done or run out checked.
2870 FPS out of 28 inch Savage 110
</div></div>

I assume you tested some other higher velocity loads, why did you settle on that velocity? was it pressure signs or just accuracy or something else?

Is that one of your customized rigs you are pushing these thru?
 
Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jack-O</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Varmint Slayer</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jack-O</div><div class="ubbcode-body">Those of you who have tested it at range please tell me how your loads hold up past 500 thru 1000+

Anyone shoot this projo/caliber combo past 1000? does the accuracy hold for your load?</div></div>

I stretch them out to 1400 yards pretty regularly and they have been pretty good so far. I have shot them on a dead calm day and produced .75 to 1 MOA, 5 shot groups and have shot them in 5-15 MPH winds and still produced more hits than misses. They buck the wind pretty good really.

My load:

74.6 H1000
WIN brass fired 6 times, one trim, FL sized every time
CCI 250 primers
2.860 ogive sitting .030 off lands
No other case prep done or run out checked.
2870 FPS out of 28 inch Savage 110
</div></div>

I assume you tested some other higher velocity loads, why did you settle on that velocity? was it pressure signs or just accuracy or something else?

Is that one of your customized rigs you are pushing these thru?</div></div>

Ya I settled there because the groups looked the best there. I tried some higher velocity loads but the groups opened up to 1 MOA or more and the amount of velocity increase wasn't enough to give up the accuracy. Its not the fastest load ever but it works for me and it does just fine past 1000.
 
Re: 208 AMAX 300Win Mag load recipies

I push the 208 amax out of my 308 to 1k and it doesn't have a problem. I am in the process of getting a 300 WM built to shoot the 208's, hopefully in the 2950-3050 range.

But you should be fine past 1k. I was watching guys make hits with the 208's at 1 mile.
 
Re: 208 AMAX 300Win Mag load recipies

Ya the 208 sure can get there. I have been going through numbers in my ballistic software, and man numbers from my chrono to the software are looking good for LR shooting. I was able to get in the .5 MOA with the 208's.



Aron-
 
Re: 208 AMAX 300Win Mag load recipies

Shot one 3-shot group at 208 yards on Sunday - was working on load development for .260, but pulled the .300 out for fun. 1" 3-shot at 208 yards including cold bore. Just pulled it out, took 3 shots, and put it away. Good rifle. Good load.
 
Re: 208 AMAX 300Win Mag load recipies

Bob L. Swagger....is your load built off full length sized brass or neck sized? I am using Win brass so I am not sure what the capacity of it is compared to Rem brass but I did measure and in my 700 5R it looks like the brass is growing about .0225 thousandths after one firing measured at the shoulder. If I understand correctly to make the brass last the thing to do is just neck size and use a collet to work the body down. The idea of fireforming cases does not excite me at all however but .0225 of growth seems like so much that a new load would have to be worked up.
 
Re: 208 AMAX 300Win Mag load recipies

For brass to last yes neck sizing and annealing for 300 Win Mags will do the trick. It did for me.





Aron-
 
Re: 208 AMAX 300Win Mag load recipies

I must have a slow barrel? I have a 25" Hart that Alan Brown built. It takes 79gr of H1000 to get little over 2900fps.
 
Re: 208 AMAX 300Win Mag load recipies

I have been reading a lot of threads on the C.O.A.L and I am at 3.697 which is .005 of the lands according to my precision mic. I have checked it probably 30 times and it seems the chamber is long.

I just got this rifle and it's a 700 SF II 300WM. I have only shot break in rounds through it but the chamber seems longer than what I have seen?? I use 76.5 grains of H1000 and Winchester brass. I haven't chronographed it yet.
 
Re: 208 AMAX 300Win Mag load recipies

Instead of deleting my post I will post what I found to be wrong. This was a valuable lesson for any reloader. If something seems out of the norm....it probably is.

My new C.O.A.L is 3.590 which is .005 off the lands. My new precision mic had a burr on the threads and it stopped about .010-.020 before it should have. The chamber gauge still had no movement so I had no reason to suspect it was wrong. After reading everyone elses C.O.A.L I became concerned about my reading. Put my reading glasses after wife got on me and I noticed a ding in the threads of the mic. I screwed it down and who knew...it stopped exactly where it did every time. I cleaned the threads and started the process over. I now have the corrected length 3.590 and things are back to normal.

Maybe this will save someone a issue in the future?
 
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Re: 208 AMAX 300Win Mag load recipies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bryce6750</div><div class="ubbcode-body">I must have a slow barrel? I have a 25" Hart that Alan Brown built. It takes 79gr of H1000 to get little over 2900fps. </div></div>

Me too. 78.5gr of H1000 ~ 2900fps.

Some people claim 3050 with this bullet. What kind of barrels do they have?
 
Re: 208 AMAX 300Win Mag load recipies

My data is real close to Swagger's. I am getting 2900 with 76.5 gr H-1000 seated about the same, 215M, 26" Benchmark barrel, Savage
 
Re: 208 AMAX 300Win Mag load recipies

you will see some "majic" barrels on here 80grains"<--dont do this" in wm runnin 4k fps no pressure sighns, my car gets 70mpg 'eldarados are great cars!
there are some VERY sharp reloaders on here and there is also some info that must be "sorted" through
 
Re: 208 AMAX 300Win Mag load recipies

The brass used makes a HUGE difference in the velocities.

the most generous brass case is the norma stuff.

remington brass has @88gr capacity grains of water
Norma brass has @95.5 capacity grains of water

According to Quickload:
76gr h1000 in Norma brass yields 2677fps at 43800 PSI
76gr h1000 in Remington yields 2900fps at 61000 PSI (compressed load)
76gr h1000 in Winchester brass yields 2790fps at 51250 PSI (slightly compressed load)

of note also is that the velocity king with the 208 seems to be 89.6gr of VV N570 in a Norma case seated to 3.590 at ~3079fps and max SAAMI pressure


If you list your load is it CRITICAL to list your brass and Cartridge OAL. That answers the velocity differences by itself.



 
Re: 208 AMAX 300Win Mag load recipies

I am working in a H-1000 load with 208 AMAX in a Savage LRH 300winmag (obviously..)

Heading out on Thursday to test the loads.

I am contending with magazine restrictions, so my COAL is 3.515ish.

Starting at 75.5gr and working up to a 77.1C load. Not sure I am going to get to 77.1C based on others experiences. Will see Thursday though.
 
Re: 208 AMAX 300Win Mag load recipies

73.5 grains VV N165,
Rem brass (typically neck sized and annealed)
CCI 250 primer
Seated to AI Mag length (massive jump to lands)
Getting 2850 fps
 
Re: 208 AMAX 300Win Mag load recipies

I found a good load at 72 grs of RL22 @3.67" oal, 2.94" to the ogive. No chrono data, but I got a 3 shot group @.9" @300 yds. Looks promising.
 
Re: 208 AMAX 300Win Mag load recipies

I have found a great shooting load but it is a little on the warm side so I was hoping Jack-O might take a look at the quickload and see if a brass change might help.
The primers are starting to flatten a little but the real problem is that the bolt sticks at the very end of the lift..you have to put a little extra pressure and it usually pops free but as you all know this is no go in either a comp or hunting situation. Here is my load. I have not put it over a chrono yet, but im guessing 2930ish...

RWS Brass
77.7g retumbo
CCI mag primer
COL(measured from ogive) 2.860
.010 off lands
Kreiger barrel
 
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