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

 

[RockAndSage]

OP, it's far more likely that something other than that barrel is the problem.

One thing I didn't see mentioned is your scope - what is it, and how does it stay zeroed on a different rifle?

Also, you might try shooting without the break or thread-protector on, just as part of trouble-shooting.

 

[Brucebarker024]

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

I’ll second this. Proof spells out foot pounds for their barrels.

 

[Benny119]

I have a couple proof carbons that shoot amazing. I do have a proof carbon in 7-08 that will not shoot, but it is more like 1 to 1.5 moa. So I wouldn’t rule out getting a bad barrel.

Years ago I bought a 6.5 PRC. This was my first magnum rifle. It took a lot of shooting for me to realize I shot it much better with a loaded bipod and a solid rear bag.

It looks like you have some pretty premium components. Have you tried different shooting setups?

 

[Mbell91]

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

thank you for the comment! I check my torque wrench to see if I had goofed up and luckily I didnt reset it from when I assembled the gun last. It read 75 lb-ft.

 

[gbflyer]

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

What will that do for accuracy?


Sent from my iPhone using Tapatalk

 

[Timjohnson11]

Not directly applicable but I picked up a 16” 22 ARC Proof barrel for my AR earlier this year. It was recalled before I even had a chance to install it, with Proof citing widespread accuracy and gas port deterioration issues on their 22 ARC line of offerings. Sent it back and got refunded.

 

[Mbell91]

OP, it's far more likely that something other than that barrel is the problem.

One thing I didn't see mentioned is your scope - what is it, and how does it stay zeroed on a different rifle?

Also, you might try shooting without the break or thread-protector on, just as part of trouble-shooting.

I currently have a MK4 leupold on it but I have had issues with leupolds in the past. I have a trijicon tenmile I can swap it with and give that a whirl.

Is it possible the break could be causing POI changes to that extent? I didn't think of that but I will give that a try as well. Thank you for the suggestions.

 

[davsco]

i just added a TI brake to a previously unthreaded muzzle (proof carbon prefit) and it changed the POI by like SIX inches. removed it and switched to their stainless version i had sitting around and it moved the initial POI by maybe 3 inches.

i have a couple of proof barrels and when i couldn't get the 300wsm one to shoot, they had me send it back and they replaced it no problem.