PWS diablo 7.62X39 7.5" barrel accuracy problem

bunker buster · 2025-04-05T12:48:16-0400

Hi Guys,

I've been having inconsistent accuracy with my PWS diablo. It range from 5" to 7" spread at 100 yards.
Ammo I used Golden Tiger, Barnaul and Belom.
Sometimes it would shoot to consecutive rounds side by side then on the third and fourth it would fly to extreme right or left it seems I can't to get it to group tighter.
I read PWS upper are accurate but not mine. Is this inherent to PWS 7.5: barrel?
What can I do to make it accurate?

Ernest 5.56 · 2025-04-05T13:01:33-0400

Check the crown
optic mount torque
Mark up bullet with black sharpie and chamber and remove
Try without muzzle device
Verify with another optic

The last half-inch or so of your barrel is absolutely critical. Any damage (or abnormal wear) near the crown will cause a significant drop-off in accuracy. Here are ways you can check the end of your barrel, using a common Q-Tip.

Use Q-Tip for Barrel Inspection

To find out if you have a burr or damage to your crown, you can use an ordinary Q-tip cotton swab. Check the edges of the crown by pulling the Q-tip gently out past the edge of the crown. If you have a burr, it will “grab” the cotton and leave strands behind

LRRPF52 · 2025-04-05T13:22:03-0400

Golden Tiger, Barnaul and Belom.

I would be happy with it just hitting the paper with any of that ammo.

I would have a little higher expectation from Belom, but not much.

If you ever got a chance to tour a Russian factory, you would lose any semblance of mediocre expectations too.

DrDeath · 2025-04-05T13:48:40-0400

Ok. I have a Diablo. It’s not an even close to a hunting rifle accuracy. It in 7.62x39. It’s shooting imported crap ammo. And it’s under 10inch barrel. That bullet is gtg for 15 yards and in accuracy. Shoot it and enjoy.

Ernest 5.56 · 2025-04-05T18:05:57-0400

Wow even the 223 version has large groups

dms416 · 2025-04-05T18:14:45-0400

Ernest 5.56 said:
Wow even the 223 version has large groups

View attachment 8657477

One of our neighboring agencies bought a whole slew of PWS's and about 6-8 were 8.5"? shorty 5.56's and they were horrid. With 55gr fmj training ammo, they'd struggle to make 6MOA. And without suppressors, they were obnoxious as hell (could be a factor).

OP, 7.5" 7.62x39 shooting low-quality ammo....c'mon man...garbage in, garbage out.

Ernest 5.56 · 2025-04-05T18:20:50-0400

I wonder how much of the group size is due to system design or just barrel quality

dms416 · 2025-04-05T18:56:31-0400

Ernest 5.56 said:
I wonder how much of the group size is due to system design or just barrel quality

Fair question. I wouldn’t be shocked if some of it was flinch as these never got suppressors. They were sent back for 12.5s with cans…. Which seem to be normal.

TonyAngel · 2025-04-05T23:03:14-0400

I normally wouldn't disagree with all of the comments about crappy ammo, but I know for a fact that Barnaul steel cased HPs are capable of some very good accuracy. I get anywhere from just under MOA to about 1.5 with Wolf HPs out of my Ruger American Ranch.

What twist rate is your barrel? What is the diameter of the bore? Somega barrels have a .308 bore and some have a .311 bore. Some ammo has .308 projectiles and some have .311 projectiles.

7.62x39 is just a big pain in the butt. With the exception of my Ruger American, and the stock of ammo I have for it, I've abandoned x39 in favor of 300BO. Not quite the thump, but it makes life a lot easier.

Search

Search

Download Gravity Ballistics

PWS diablo 7.62X39 7.5" barrel accuracy problem

bunker buster

Private

Ernest 5.56

Sergeant of the Hide

LRRPF52

Sergeant

DrDeath

Colonel

Ernest 5.56

Sergeant of the Hide

dms416

Sergeant

Ernest 5.56

Sergeant of the Hide

dms416

Sergeant

TonyAngel

Sergeant

Similar threads