- Joined
- Apr 12, 2013
- Messages
- 562
So i have a 300 Blackout barrel that shows accuracy issues...bullet holes are oblong (and shifted point of impact a lot) in a target with the brake on, perfectly round (and on target) with the brake off. After a bunch of testing I have narrowed it down to light bullet contact in the muzzle brake. I need to figure out if the machining problem is the barrel threads or the muzzle brake. YHM brake. AR Stoner factory threaded cromoly barrel with 'Melonite' treatment.
Suggestions? No I don't have spares of either for comparison, and the brake is a suppressor mount so I am not going to risk my suppressor on live testing either.
I can't see how to directly measure concentricity in existing muzzle threads without cutting/chasing them and thereby removing the barrel nitriding.
Same problem on internal threads for the muzzle brake.
Maybe easier to just part off the barrel threads and recut?
Suggestions? No I don't have spares of either for comparison, and the brake is a suppressor mount so I am not going to risk my suppressor on live testing either.
I can't see how to directly measure concentricity in existing muzzle threads without cutting/chasing them and thereby removing the barrel nitriding.
Same problem on internal threads for the muzzle brake.
Maybe easier to just part off the barrel threads and recut?