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Ive had the exact opposite experience. Can off, open groups. Can on, Tightens right up. Proof Sendaro 20" 6.5CM
I hear you. I’m had my 6.5CM changed from a proof to a bartlien that Tim Roberts is putting together for me.
So I’m having the same issue with my AI prefit 16.5” proof carbon 308 barrel. Shot fine with fed GMM 168 SMK’s with my Area 419 hellfire brake. Throw my TBAC ultra 9 on the gun, poof. It’s like I’m just intentionally horizontally stringing shots. Tried working up loads with zero luck which is depressing in and of itself.
Previous owner had good luck with the barrel with a surefire can as he had put less than 50 rounds through it. Had my buddy shoot it, still shot like shit, had a local gunsmith scope the bore and he said the barrel looks brand new with very little fouling(250ish rounds down it). Have an email into proof to see what they say. Mildly depressing but after seeing the customer service report on here, I’m sure they’ll take care of me.
I’m gonna give it a few more days but I’ll be calling if I don’t hear anything soon. AI prefits should be fine but shit happens I guess. I hand tighten it and then torque the grub screw to 49in lbs per AI. The 6.5cm barrel absolutely hammers. Shoots sub 1/2” consistently.Phone call is much better to proof. You should be able to have them go over your barrel. Your going to have to send them the rifle so they can figure out what is causing it shoot horizontally strings. I’m not a fan or prefits but could you explain how you mate your barrel up? Does your other barrel of same caliber shoot good?
Did you have any luck with it? The more smiths I talk to about it they are leaning more towards the barrel was lapped by proof.I’m gonna give it a few more days but I’ll be calling if I don’t hear anything soon. AI prefits should be fine but shit happens I guess. I hand tighten it and then torque the grub screw to 49in lbs per AI. The 6.5cm barrel absolutely hammers. Shoots sub 1/2” consistently.
I sold it to a guy under full disclaimer. Proof never got back to me about it and I didn’t feel like messing with it. Ended up with a 20” lothar walther 308 barrel for my AI.Did you have any luck with it? The more smiths I talk to about it they are leaning more towards the barrel was lapped by proof.![]()
I sold it to a guy under full disclaimer. Proof never got back to me about it and I didn’t feel like messing with it. Ended up with a 20” lothar walther 308 barrel for my AI.
That’s the plan lolI would give bartlein a try if you ever go carbon again.