Proof Barrel Problems

[Mbell91]

I have recently ordered and put together a 6.5 prc build off a impact percision nbk action using a proof 22in barrel. I assembled the rifle using manufacturers recommendations and torque specs and have recently taken it out to the range to see how it shoots.

I was less then pleased when I couldn't group anything under 2ins. I thought it might have been the scope rings shifting, but after switching to some 419 rings and rezeroing, I had the same issue. So I thought it was me, maybe im pulling my shots, so I had a friend try it out and he had the same issue.

I have stripped the gun apart, cleaned it, reassembled everything and still can't get it to shoot. So long story short has anyone had issues with pre-fit barrels coming from Proof?

 

[skipper907]

I have heard some adding a heavy weight (stainless) break helps

 

[505Wapiti]

What kind of stock and what are your action screws torqued to? Also what is twist rate of barrel and what projectile are you sending down range?

 

[Mbell91]

What kind of stock and what are your action screws torqued to? Also what is twist rate of barrel and what projectile are you sending down range?

Im using a MDT CRBN torqued at 60in-lbs and a Proof 22in CF barrel w/ 7.5 twist torqued at 70in-lbs per their recommendation. I also have an Unkown Munitions 3 port TI muzzle brake attached.

I have tried 147gr eld-m, 143gr eld-x, and Berger 156gr J4. I have not done a load development yet because i expected to have better results with factory ammo.

 

[Mbell91]

not the best picture only one i had on hand.

 

[ckleeves]

Most Proof prefits shoot pretty darn good, but that’s not to say you couldn’t have gotten a bad one. Every barrel manufacture puts out a few turds. 2’+ with 3 different types of factory ammo is pretty bad, I think I would try a different scope if you have another handy, try it without the muzzle brake and if you have access to a different stock or chassis try it in that. If all those things fail send it back to Proof.

 

[MagnumHntr]

Im using a MDT CRBN torqued at 60in-lbs and a Proof 22in CF barrel w/ 7.5 twist torqued at 70in-lbs per their recommendation.

Torque that barrel to 80-100 LB-FT. If you actually have it torqued to 70 lb-in that is probably your problem