Hey guys I been tinkering around with some different loads to a) establish what my rifle likes best @100y (I have that pet load and works well) . B) find my best 200 yard load (also all set ) and then develop a sufficient long range loading . Hoping i would have been in the 1.5 / 2.0 moa area at 700 I played with 175s and started to make some headway at that distance . No sooner did I get my numbers worked out did I gain access to a piece of private property where I was able to mark off 1000y and put a piece of plate out. We'll after a night on bench basing my loads on what my target velocity was and some research I figured on using my 155 sierra palma match bullet with varget and br2 primer . I also had 175smks from my pet data list . the 175s I believe we're transitioning to transonic as they were very inconsistent on target end . . The 155s had enough ass to get their but my 700 aac sd 308 didn't shoot them particularly well. After doing some reading I saw the .308 guys using 20" 1/10t at 1000y were all using loads that were around 2800fps at muzzle or faster some more serious higher end owners where in the 3k- 3100fps range. I was having issues getting velocities even on 2650 side . I played with the palma match 155 w/46.1g varget in lapua brass and was kind or disappointed . Wondering what's the fastest you guys are pushing your 308 bullets in 20" barrel . with 46.1g of varget and lapua brass / 155palma i was getting such tough extraction i was having to palm stamp the bolt open to eject the case. primer had signs of "higher" pressure . anyway my target goal was originally 2800 fps but am curious what you guys are using for a long range load and what the velocities are. again just want to see what you guys are having luck with
- Thread starter FullMetalJacket
- Start date
I have a 20 inch AAC-SD, those velocities are going to be tough with only a twenty incher. You would not think 4-6 inches make a world of difference but it does!!! I get no pressure sign's on these loads, but my bore is coated and it reduces my pressures and velocity some!!!
Check out Hodgdon's website with a 155gr bullet and CFE223:
Manufacturer Powder Bullet Diam.
C.O.L.
Grs.
Vel. (ft/s)
Pressure
Grs.
Vel. (ft/s)
Pressure
Hodgdon H414 .308" 2.775" 48.0 2,625 40,500 CUP 51.0 2,793 50,200 CUP
Winchester 760 .308" 2.775" 48.0 2,625 40,500 CUP 51.0 2,793 50,200 CUP
IMR IMR 4007 SSC .308" 2.775" 46.5 2,592 41,700 PSI 49.5C 2,751 49,900 PSI
Hodgdon CFE 223 .308" 2.775" 49.5 2,846 50,900 PSI 51.0 2,966 60,500 PSI
These are max loads, use with caution!!!! My 26 inch 1-in-12 twist, bore is coated with molly from Senrty Solutions Sentry Solutions: Smooth-Kote™ 2 oz. jar
My loads:CFE-223:GSC 137gr bullet, 54grs, CCI mag primer/Federal LRM, Lapua,Federal,Hornady fire formed brass, 3168 FPS out of my 26 inch
CFE-223:GSC 137gr bullet, 53grs, CCI mag primer, LC fire formed brass, 3160 FPS out of my 26 inch
GOOD LUCK
Check out Hodgdon's website with a 155gr bullet and CFE223:
Manufacturer Powder Bullet Diam.
C.O.L.
Grs.
Vel. (ft/s)
Pressure
Grs.
Vel. (ft/s)
Pressure
Hodgdon H414 .308" 2.775" 48.0 2,625 40,500 CUP 51.0 2,793 50,200 CUP
Winchester 760 .308" 2.775" 48.0 2,625 40,500 CUP 51.0 2,793 50,200 CUP
IMR IMR 4007 SSC .308" 2.775" 46.5 2,592 41,700 PSI 49.5C 2,751 49,900 PSI
Hodgdon CFE 223 .308" 2.775" 49.5 2,846 50,900 PSI 51.0 2,966 60,500 PSI
These are max loads, use with caution!!!! My 26 inch 1-in-12 twist, bore is coated with molly from Senrty Solutions Sentry Solutions: Smooth-Kote™ 2 oz. jar
My loads:CFE-223:GSC 137gr bullet, 54grs, CCI mag primer/Federal LRM, Lapua,Federal,Hornady fire formed brass, 3168 FPS out of my 26 inch
CFE-223:GSC 137gr bullet, 53grs, CCI mag primer, LC fire formed brass, 3160 FPS out of my 26 inch
GOOD LUCK
Last edited:
ya i been trying to stay away from molly coating , i run a yhm 30 cal can , am almost wondering if i should switch up to a 300wm for long range and keep the .308 for shooting subs through suppressor and shorter ranges. you see guys on youtube with our aac-sd 700s at 1k and 1400 i dont get it
AAC-SD owner here as well. I am no expert by any means, but here is what i have found with this rifle/caliber with any load at distance (800+)...wind. Even a faint breeze...be it 175 FGMM, M118LR, my own loads (150's, 175's) which i wont post because i am new to hand loading and wouldnt want anyone using mine (they aint special, i just dont want an accident on my conscience)...wind is the master of the .308. Shot the PTS comp a few weeks ago and the 6.5cm guys were holding .4 or .5 wind on the 1085 yd steel...me and the(few) .308 guys were holding 2.5 mils in same conditions....and still missing due to wind with elevation being dead-on. I chrono'd 2900fps(avg) using MK319(130 gr OTM Barrier) and it is fantastic out to about 750...after that it goes short-bus in any wind.
Best advice i ever got on the .308? Learn to read wind. Still learning....
Just today. AAC-SD 175smk IMI match brass fed primer,43.5g IMR 4064. Ejector mark but easy extraction.
^^^^Factory trigger, floppy hogue stock. Harris bipod, tab rear bag off the bench. My XLR chassis is on the way.
I'm using 178amax. 43.5 of 4064 and Lapua/ hornandy match brass. MV just shy of 2700 hitting 800-900 consistently. Grouping isn't the best. I have mine sitting in an MDT LSS chassis. Harris bipod and Ross Schuler brake. Swfa 16x fixed scope. Timney set at 2lbs.
20" AAC SD in an AICS here. I've been trying to find a good load with Reloder 17 and 185 juggernauts, but I can't seem to get anything under 1.5 inches at 100.
My go to load is Lapua brass, 175 gr Berger OTM tacticals seated to 2.875 OAL over 45.2 gr Varget.
I did some work ups with ar comp and 4064 at the same 2.875 OAL this weekend:
Ar comp loads are circled.
My go to load is Lapua brass, 175 gr Berger OTM tacticals seated to 2.875 OAL over 45.2 gr Varget.
I did some work ups with ar comp and 4064 at the same 2.875 OAL this weekend:
Ar comp loads are circled.
41.3 node for the ar comp ? how far off lands are you at 2.875 . i had decent luck on low end using varget and 175smks . have always been sub moa with 175s but not at great speeds . i had increased charge for longer range use
Last edited:
i appreciate everyone responding back to compare notes. helps to have fellow aac sd shooters to talk to and see how you guys are doing
Hodgdons cfe 223 / 155g loads but thats also with 24'' barrel so assuming a 75fps loss (which is about what i've experienced when using a 20'' barrel, i dont know theirs much advantage over using varget . been tinkering with diff powders but vargets always one i turn back to . always seem to have the best SD and Extreme spreads with it. i have a buddy using the IMR XBR 8208 but has only played with 168s with it ( had pretty successful results with it)
Hodgdon CFE 223 .308" 2.775" 49.5 2,846 50,900 PSI 51.0 2,966 60,500 PSI
My local gun shop had the Berger 185 juggernauts but afraid to go any heavier than the 175smks as i was experiencing some inconsistencies at 1000y with them . im sure most of you have come across this but worth a second look
http://riflemansjournal.blogspot.com/2011/01/cartridges-1000-yard-308-load.html
Hodgdons cfe 223 / 155g loads but thats also with 24'' barrel so assuming a 75fps loss (which is about what i've experienced when using a 20'' barrel, i dont know theirs much advantage over using varget . been tinkering with diff powders but vargets always one i turn back to . always seem to have the best SD and Extreme spreads with it. i have a buddy using the IMR XBR 8208 but has only played with 168s with it ( had pretty successful results with it)
Hodgdon CFE 223 .308" 2.775" 49.5 2,846 50,900 PSI 51.0 2,966 60,500 PSI
My local gun shop had the Berger 185 juggernauts but afraid to go any heavier than the 175smks as i was experiencing some inconsistencies at 1000y with them . im sure most of you have come across this but worth a second look
http://riflemansjournal.blogspot.com/2011/01/cartridges-1000-yard-308-load.html
Last edited:
Long range Remington 700 AAC-SD .308 owners / reloaders , on 1000 yard quest....
I'm about .130" off the lands at 2.875".
OAL right in the lands was about 3.008"
I was hoping for a bit more velocity, but I've been seeing really low SDs with AR comp. I'm right at 2560 fps.
I'm about .130" off the lands at 2.875".
OAL right in the lands was about 3.008"
I was hoping for a bit more velocity, but I've been seeing really low SDs with AR comp. I'm right at 2560 fps.
Last edited:
Once you get a load, go to JBM ballistics site and see what kind of velocity you have left at 1000k. I can tell you that it will be quite tough to accomplish with a 20" barrel. On the plus side is that the throat is very long so you can seat bullets way out to increase capacity. Provided you are shooting on a proper target range, I suspect that your pit pullers will be able to tell you if your bullets are supersonic or not. I would look to 175g VLD bullets and run them as fast as you safely can to see what you get. Pick Light cases and don't use LC brass. You CAN run a bolt gun harder then an M14 and you can keep .308 supersonic at 1000 yds out of an M14 but its tough. Provided your can does not have ill effects, it will give you another 50-100FPS over no can I suspect.
Last edited:
My 1Kyd load is/was 42.2gr IMR-4064 in Rem Brass, BR-2 Primer, 175SMK at 2.810: OAL. It would definitely reach 1Kyd supersonic out of an M1A; I have no idea whether it will do the same out of a 20" barrel.
Greg
Greg
Last edited:
Just load tested/chrono'd the following yesterday from my AAC-SD (HS Precision M24 stock, Magazine Fed, Timney trigger, Muzzle Brake, USO ST-10 scope)
44gr IMR 4064, FC Brass, BR 2 Primers, 175 SMK Lake City pull downs
MV: 2600 FPS (10 shots Avg)
The 10 shots were broken into 2-5 shot groups which were both in the .65 -.75" size range. Slight ejector marks but no stiff bolt or flattened primers.
46 gr H4895, Br 2 Primers, FC Brass, 130 grain OTM/SOST (MK 319 Mod 0 pulls)
MV: 2899 (10 Shots)
Again, 2-5 shot groups which were both under .75"
All shot prone through a Caldwell chrono, on dirt/grass from shooting mat with Atlas Bipod
Afterward, input the data into "Ballistic" (on Ipad) and made first round hits on steel at 600 yds with both loads. I am happy with both loads and will be putting them into production immediately.
44gr IMR 4064, FC Brass, BR 2 Primers, 175 SMK Lake City pull downs
MV: 2600 FPS (10 shots Avg)
The 10 shots were broken into 2-5 shot groups which were both in the .65 -.75" size range. Slight ejector marks but no stiff bolt or flattened primers.
46 gr H4895, Br 2 Primers, FC Brass, 130 grain OTM/SOST (MK 319 Mod 0 pulls)
MV: 2899 (10 Shots)
Again, 2-5 shot groups which were both under .75"
All shot prone through a Caldwell chrono, on dirt/grass from shooting mat with Atlas Bipod
Afterward, input the data into "Ballistic" (on Ipad) and made first round hits on steel at 600 yds with both loads. I am happy with both loads and will be putting them into production immediately.
I'm going to try some solid copper 137 gs custom bullets BC .461, if I can get 2900 fps out my aac-sd 20" I should be able to reach a 1000 yards and be at 1264 FPS and only need 30.50MOA
Out of my 26" 1:12" twist barrel I get about 3160 FPS with CFE-223, so 2900 should be possible out of my 20" 1:10" twist barrel.
Win/BHA/LC brass Fire Formed , CCI BR2/Fed215m, CFE-223 54 Grains,137 Gr GSC bullet
Last edited:
With a BC that surpasses the 155 class bullets and even the 175 smk, Berger’s 168 classic hunting hybrid is what I choose to use. I use a FDAC (designed for 175 smk’s, aka Field Density Altitude Compensator, which is so frickin' accurate its has to be seen in use to believe) and can use the 2650 card for this bullets 2610 fps average. It will make 1k with consistency but I rarely shoot this rifle past 800 as I have other calibers that are better suited for 1k.
Range was 300y and dots are 2 inches, 4-5mph wind from 7 o’clock with gusts up to 10. I’ll probably go with 44.3g of varget, I was running this hotter (2670) but decided to drop back one node.
Range was 300y and dots are 2 inches, 4-5mph wind from 7 o’clock with gusts up to 10. I’ll probably go with 44.3g of varget, I was running this hotter (2670) but decided to drop back one node.
Last edited:
