308 AR10 Build Info/Picture Thread

#901
jLorenzo said:
Closer to Krieger and Bartlein or closer to Criterion, BA and the like? How do they shoot?
Click to expand...
I'm probably the wrong guy to ask. Anything 5.56 gets shot with an LPVO, and it eats my established loads I already have, I don't do load development anymore. It shoots blaster 55gr around 1.5" and 69/77gr stuff around .8". Maybe it can shoot better but thats about all I can do with 6x and a lighter gun. The 6mm Grendel has shot quite a few .5" groups but I would call the average slightly bigger than that. But again, I'm the wrong guy to ask, I pretty much only shoot groups on paper to zero the scope then once in a blue moon after that to verify zero. Once it shoots where I point its time to go hit things.

Also, as an owner of Criterions and BA's, I wouldn't put them in the same tier.
 
Last edited:
  • Like
Reactions: jLorenzo and Jsp556
#902
45-90 said:
This is the 6 lb 308, with a Leupold Mark4 M3, already zeroed for the 168 eldm at an average of 2756 fps.
I have more 308s than any other caliber, 8 at one time. Might be down to 6 or 7.
Barrels 16, 17, 20, 22, 24, 26, 27, & 30 inches. The 20", and the 26" were shot out at 8000 rds each. One 18" was taken off cause it did not preform well, and was a BA barrel. Replaced by a Proof barrel. Usually ya get what ya pay for, sometimes a cheap barrel will preform. But I believe you're better of spending at least mid price range for a barrel.
My light 16" is a shooter, with the 168 eldm, the newer 169 & 177 SMK.
But I also like the 18" Proof, in AR 10s I also have a 24" in the AR.
They are all easy to shoot, but for really long range it would be the 30" 8 twist shooting 230 Aips at 2620 fps.
I'm busy with other projects at this time.
A 6.5 twist 8.6 blackout bolt gun...and a 338 Ruger Compact Magnum for the AR 10 has just been chambered and assembled.
Loading for it now.
Click to expand...
What handguard is that ? Smoke Composites ?
 
#903
TonyTheTiger said:
I'm probably the wrong guy to ask. Anything 5.56 gets shot with an LPVO, and it eats my established loads I already have, I don't do load development anymore. It shoots blaster 55gr around 1.5" and 69/77gr stuff around .8". Maybe it can shoot better but thats about all I can do with 6x and a lighter gun. The 6mm Grendel has shot quite a few .5" groups but I would call the average slightly bigger than that. But again, I'm the wrong guy to ask, I pretty much only shoot groups on paper to zero the scope then once in a blue moon after that to verify zero. Once it shoots where I point its time to go hit things.

Also, as an owner of Criterions and BA's, I wouldn't put them in the same tier.
Click to expand...
I'd be happy with that, especially if its pretty consistent.
 
  • Like
Reactions: TonyTheTiger
#904
bfoosh006 said:
What handguard is that ? Smoke Composites ?
Click to expand...
Jacob Grey carbon fiber 1oz and I believe 3 oz for the mounting hardware and barrel nut. Titanium muzzle brake 1 oz. Titanium bolt carrier. Roam magnesium upper. Fluted SS barrel slightly heavier than a pencil but I wanted a more accurate barrel than a pencil, by saving weight elsewhere a heavier barrel was installed but still making a light, but accurate AR 10 capable of .5" accuracy for 5 shots at 100yds.
 
  • Like
Reactions: bfoosh006
#906
It aint no 308 Win...but a 338 RCM, finish weight 7 lbs 11 oz. Without scope. 18" fluted barrel I chambered.
Shot some nice grouos first time out, with the hunting bullets I tried.
Speer 200 gr were 2700 fps, 225 gr 2500 fps, and 250 gr GS were over 2400 fps, and 160 gr Barnes copper also shot nicely with the first powder I tried.
Most are running 3200 ft/lbs of muzzle energy from the ARs 18" barrel.
Good enough for most hunting as is, but further testing with different powders, and bullets will be fun.
 

Attachments

  • 20240418_212631.jpg
    20240418_212631.jpg
    540.1 KB · Views: 89
  • 20240421_100219.jpg
    20240421_100219.jpg
    361.9 KB · Views: 87
  • 20240421_095749.jpg
    20240421_095749.jpg
    300.5 KB · Views: 88
  • Like
Reactions: bfoosh006 and rpoL98
#909
JR1200W3 said:
TAC. It's a beast in short barrelled 308s
Click to expand...
Nope..it ain't TAC, 16" starting loads are over 2800, and moving up to 2875 to 2880 with 155 Palma bullets.
With 155s, tipped 155s 2900. But wouldn't run them there.
My 168 ELDM load average is 2756 fps, with small 5 shot groups, which is my go to load, with this barrel along with 169 and 177 SMK....the heavy load is 208s at 2442 fps from the 16" barrel.
And the gun is 6 lbs, of carbon fiber, titanium, & magnesium.
Most of these loads are one tenth under maximum loads in the manual.
Not all barrels give the same velocity. My 16" is only about 10 to 15 fps slower than the 18" with same load.
 

Attachments

  • 20230905_150313.jpg
    20230905_150313.jpg
    752.6 KB · Views: 75
#910
45-90 said:
Nope..it ain't TAC, 16" starting loads are over 2800, and moving up to 2875 to 2880 with 155 Palma bullets.
With 155s, tipped 155s 2900. But wouldn't run them there.
My 168 ELDM load average is 2756 fps, with small 5 shot groups, which is my go to load, with this barrel along with 169 and 177 SMK....the heavy load is 208s at 2442 fps from the 16" barrel.
And the gun is 6 lbs, of carbon fiber, titanium, & magnesium.
Most of these loads are one tenth under maximum loads in the manual.
Not all barrels give the same velocity. My 16" is only about 10 to 15 fps slower than the 18" with same load.
Click to expand...
Leverevolution?
 
#911
Nope t
jLorenzo said:
Leverevolution?
Click to expand...
Nope...tried Leverevolution, its good in the 6 mm ARC...but not the 308...it won't get the velocity, even the velocity some have claimed...I chronographed those loads they recommended, plus accuracy wasn't near as good.
Look at the Speer loading manual, you'll find 2000MR.
 
  • Like
Reactions: jLorenzo
#912
45-90 said:
Nope t
Nope...tried Leverevolution, its good in the 6 mm ARC...but not the 308...it won't get the velocity, even the velocity some have claimed...I chronographed those loads they recommended, plus accuracy wasn't near as good.
Look at the Speer loading manual, you'll find 2000MR.
Click to expand...
Have you tried 2520 or 2200?
 
#913
PSA Sabre-10A1

Overall a very nice AR10. Swapped to a SL-S stock to use the limb-saver recoil pad and Arisaka bag rider. Trigger is pretty nice but my reset feels sticky. I have a SSA-E laying around I might throw in it. Factory crush washer was so warped it wouldn't slide off, I'm surprised I didn't ruin the threads trying to get it off. Running a Mk5 3.6-18 and Sandman-mil on a Area 419 universal adapter.

Waiting on my projectiles to get here tomorrow so I can start load development for this thing.
 

Attachments

  • IMG_6837.JPG
    IMG_6837.JPG
    825.7 KB · Views: 256
  • IMG_6836.JPG
    IMG_6836.JPG
    797.4 KB · Views: 194
  • IMG_6834.JPG
    IMG_6834.JPG
    550.2 KB · Views: 148
  • IMG_6833.JPG
    IMG_6833.JPG
    446.1 KB · Views: 172
  • Like
  • Love
Reactions: JR1200W3, Makinchips208, AMGtuned and 7 others
#914
bf2junky said:
PSA Sabre-10A1

Overall a very nice AR10. Swapped to a SL-S stock to use the limb-saver recoil pad and Arisaka bag rider. Trigger is pretty nice but my reset feels sticky. I have a SSA-E laying around I might throw in it. Factory crush washer was so warped it wouldn't slide off, I'm surprised I didn't ruin the threads trying to get it off. Running a Mk5 3.6-18 and Sandman-mil on a Area 419 universal adapter.

Waiting on my projectiles to get here tomorrow so I can start load development for this thing.
Click to expand...
1713829307281.png


I can't help but want one of those and the Sabre 110 whilst finishing my LM8 lol.

How's the weight? Please post your accuracy results the QVD review had surprisingly good results accuracy wise.
 
#917
45-90 said:
Nope t
Nope...tried Leverevolution, its good in the 6 mm ARC...but not the 308...it won't get the velocity, even the velocity some have claimed...I chronographed those loads they recommended, plus accuracy wasn't near as good.
Look at the Speer loading manual, you'll find 2000MR.
Click to expand...
Luv me some 155 Palmas, do you tweak seating depth or just load to mag length?
 
  • Like
Reactions: 45-90
#919
jLorenzo said:
Luv me some 155 Palmas, do you tweak seating depth or just load to mag length?
Click to expand...
Depends on the rifle I'm loading for....but these were mag length on the 16" 308 which reached a top speed of 2922 fps, for 5 rds..
But 2815 to 2880 is a good place to run the 155s in my 16" barrel, depending on the 155 bullet used. The 155 Palma was good but the 155gr Sierra tipped bullets was fastest and least accurate...needed some more work on that one.
So was the 168 eldm at 2756 fps half inch 5 shots, at one hundred yds.
 
  • Like
Reactions: jLorenzo
#920
JR1200W3 said:
I would do Krieger in general any day. But what else do you want in a barrel? Part of why I bought this barrel weight and gas length. I was looking for a 2 to 2.5pb barrel bc I was trying to keep the weight down. Also chose the 1-10x for this reason. If you were trying to build a rifle that you can run around with and you're going to shoot 3 to 5 minute angle targets probably wouldn't do a Krieger. For building something that you're going to lay or sit behind 90% of the time to shoot and you're only going to carry it from your car to the bench, then I would do it Krieger. In this situation I opted for weight smooth recoil and pulse and something I wouldn't feel bad about ripping 125 grain blems through at a high rate of fire.
Click to expand...
Definitely something to be said for being able to rip cheaper ammo through it without feeling bad. I'm looking for shooting on the smooth side as well but still doable off hand if need be. Hard to figure where that balance it. I have also considered Criterion but I worry I will be a little disappointed with groups.
 
#929
45-90 said:
Depends on the rifle I'm loading for....but these were mag length on the 16" 308 which reached a top speed of 2922 fps, for 5 rds..
But 2815 to 2880 is a good place to run the 155s in my 16" barrel, depending on the 155 bullet used. The 155 Palma was good but the 155gr Sierra tipped bullets was fastest and least accurate...needed some more work on that one.
So was the 168 eldm at 2756 fps half inch 5 shots, at one hundred yds.
Click to expand...
I have loaded around 46-47gr of Varget with 155s for a bolt gun, what do you think would be a good area to look at for the gas gun?
 
#930
jLorenzo said:
I have loaded around 46-47gr of Varget with 155s for a bolt gun, what do you think would be a good area to look at for the gas gun?
Click to expand...
Depends on the gas gun, 155 gr for M1A service rifle 43 grs of Varget, AR 10, 45 grs of Varget.
At 2.800" seating depth changes velocity and pressure, for the average guy and setup, factory style
I personally load my AR 10 to the same pressures as my bolt guns with an SA adjustable gas block....7 clicks down from standard loads, and run the heavy loads, so the adjusted AR 10 will take magnum pressures.
I'm currently running a 338 Ruger Compact Magnum in one AR 10, 18" barrel, at full magnum pressure on a magnum bolt boltface.
So they will take 65,000 psi loads when set up right.
Varget is generally a good accuracy 308 powder but not for every 308, or every bullet. My 16" really dislikes it, with huge S/D s of over 50 fps with weighed charges, but short range accuracy was still pretty good...maybe this was a bad lot of Varget, it's happened before, some lots in the past have complaints of being slow, slso.
 
  • Like
Reactions: jLorenzo
#931
45-90 said:
Depends on the gas gun, 155 gr for M1A service rifle 43 grs of Varget, AR 10, 45 grs of Varget.
At 2.800" seating depth changes velocity and pressure, for the average guy and setup, factory style
I personally load my AR 10 to the same pressures as my bolt guns with an SA adjustable gas block....7 clicks down from standard loads, and run the heavy loads, so the adjusted AR 10 will take magnum pressures.
I'm currently running a 338 Ruger Compact Magnum in one AR 10, 18" barrel, at full magnum pressure on a magnum bolt boltface.
So they will take 65,000 psi loads when set up right.
Varget is generally a good accuracy 308 powder but not for every 308, or every bullet. My 16" really dislikes it, with huge S/D s of over 50 fps with weighed charges, but short range accuracy was still pretty good...maybe this was a bad lot of Varget, it's happened before, some lots in the past have complaints of being slow, slso.
Click to expand...
I also have some AR Comp to try. I am still deciding whether or not to go with an adjustable gas block. The SA stays put on its setting pretty well? I have a basic 308 carbine buffer and will be going with a rifle gas tube for sure.
 
Last edited:
#933
jLorenzo said:
I also have some AR Comp to try. I am still deciding whether or not to go with an adjustable gas block. The SA stays put on its setting pretty well? I have a basic 308 carbine buffer and will be going with a rifle tube for sure.
Click to expand...
Yep, SA adjustable gas block stays put, but it should be cleaned of crud from time to time.
Set up the rifle to your liking, with a quality barrel and LC brass, and a bullet it likes these are capable of hitting less then half inch 5 shot groups, when loaded on a progressive press.
Try the cheap Speer 130 gr Varmint for close range work and LC brass, at a moderate speed, lots of tiny groups...and good for varmints.
 
  • Like
Reactions: jLorenzo
#936
jLorenzo said:
I am going to need a LR308 upper clam shell to put in a vice and put the barrel on? A regular AR15 size one wont work correct?
Click to expand...
This is what you want. Works for AR15 and AR10.

www.opticsplanet.com

JP Enterprises Universal Vise Clamp For Ar Flat Top JPVC Gun Type: Universal, Color: Red, $4.20 Off w/ Free S&H

Shop JP Enterprises Universal Vise Clamp For Ar Flat Top | $4.20 Off 5 Star Rating on 4 Reviews for JP Enterprises Universal Vise Clamp For Ar Flat Top + Free Shipping...
www.opticsplanet.com www.opticsplanet.com
 
#938
JR1200W3 said:
@jLorenzo

16" 308 for you. ADM UIC 10 builders kit. 16" fluted rifle length gas. JP LMOS BCG, SCS buffer system. Super smooth recoil impulse. 155 Palmas at 2700fps, and 125gr blems at 2820fps. But the Barnes 130gr TTSX at 2800 are the nasty business. Love this gun.

View attachment 8401953
Click to expand...

I missed it, what brand barrel?

Exactly what I am wanting.

Thanks
 
#940
#941
I use a reaction rod as the industry calls it.
I made my own.
It's 17" long 1.180" in dia or 30 mm with a vise flat milled, and diameter turned down and milled to fit the barrel extension.
The upper reciever slides over the rod and locks into the barrel extension.
Or for indexing to get at handguard screws, etc.
An excellent tool for working on ARs use the 1" dia steel for the AR 15.
I do all the work on the Bridgeport milling table, as seen here.
 

Attachments

  • 20240425_103006.jpg
    20240425_103006.jpg
    472 KB · Views: 75
  • 20240425_103051.jpg
    20240425_103051.jpg
    582.3 KB · Views: 68
  • Like
Reactions: jLorenzo
#942
jLorenzo said:
I will probably grab that. Whats the best if any DIY option for the moment?
I have the Wheeler AR15 one.
Click to expand...
You can get this from Squirrel Daddy gunsmith tools for around $26 including shipping. They can be modified to also work with an AR-15 with some basic machine work.

SD20-173-2T.jpg

ETA: If you're going to use this type of product, sandwich the upper in the vise. Do not position the upper vertically with vise only clamping the fixture, which will put all the stress on the pivot/takedown lugs.
 
Last edited:
  • Like
Reactions: Shoreglide
#943
JR1200W3 said:
What's he supposed to do with that information? You think he's going to make his own? Clearly he's looking for something to buy. Your post informs nothing, just another weird science project out a 45-90s garage where everything is a boast.
Click to expand...
Midwest Industries and Geissele sell versions. The rod needs a vertical flag to prevent the receiver from twisting against the barrel extension pin.
 
  • Like
Reactions: jLorenzo
#944
JR1200W3 said:
What's he supposed to do with that information? You think he's going to make his own? Clearly he's looking for something to buy. Your post informs nothing, just another weird science project out a 45-90s garage where everything is a boast.
Click to expand...
You can buy one...or build one.
He, or anyone else may choose to build one, if someone shows him what to do, & how it works, or... some people have relatives and friends to help them out, who have access to the needed tools.
I do lots of projects for friends, and relatives, free of charge, most are hobbies like off road vehicles or motorcycles.
I spend many hours helping on their projects.
Some people like to learn and enjoy building it themselves, or with the help of others, learn to overcome obstacles. And gain more experience and knowledge as the work on their hobbies or other endeavors. So one never knows where others will take what they learn...maybe start a business, be a world class shooter.

It's how we learn and grow as a species is sharing ideas and information.
No such thing as too much information on any subject, a starting builder, may become your next Hornady Manufacturing Company.
 
#945
Cascade Hemi said:
Midwest Industries and Geissele sell versions. The rod needs a vertical flag to prevent the receiver from twisting against the barrel extension pin.
Click to expand...
Maybe I misunderstood your post, but do you have a link for the Geissele AR-10/308 RR with a vertical flag/fin? As far as I know, they only offer the Super Reaction Rod for AR-15s, which uses anti-rotation lugs that lock into the ejection port.
 
#946
msgriff said:
Maybe I misunderstood your post, but do you have a link for the Geissele AR-10/308 RR with a vertical flag/fin? As far as I know, they only offer the Super Reaction Rod for AR-15s, which uses anti-rotation lugs that lock into the ejection port.
Click to expand...
No. Geissele and MI sell versions of 45-70's rod. MI is the only one of the two with the vertical flag.
 
#950
bf2junky said:
The JP vise blocks are vastly superior to any reaction rod.

IMO anything that uses the holes in the receiver lugs is garbage.
Click to expand...
I disagree on that. Superior to a clam shell for sure, but not a MI Reaction rod. The Midwest Rod with the sail on top locks the upper alignment with the extension lugs. This prevents any possible shear on the extension pin when torquing the barrel nut. Also very handy when mounting & leveling a scope.

1714078208883.jpeg
 
  • Like
Reactions: jLorenzo and JR1200W3
You must log in or register to reply here.

Similar threads

T
6mm ARC for 1k yards build
Replies
23
Views
960
thedude824
T
padom
20" Green Mountain AR15 Fluted 416SS 1-8 Testing
Replies
16
Views
932
NHPiper
NHPiper
S
Spring/buffer for premature ejection problem on suppressed AR10
Replies
69
Views
2K
Jdowns0415
J
ZLBubba
Firearms WTS: Sterling Arsenal custom AR (5.56/6.5G) and custom AK, Noveske Recon, Mega 308 14.5" carbine
Replies
3
Views
398
ZLBubba
ZLBubba
Rpatton73
Accessories ACCESSORIES FOR SALE!! - MOUNTS, RINGS, RAILS, RED DOTS, MAGNIFIERS, BUIS, GRIPS, STOCKS, TRIGGERS, MONO/BIPODS, LIGHTS **UPDATED 01/08/2024**
Replies
11
Views
959
clarscheid
C
Top Bottom
Back
Home
Forums
Merch
Alerts