Barrel Crowning Tool 7.624/14/2023 ![]() The next thing I would do is ensure that the flash suppressor fits against the muzzle with no gap between the two, of course I would also ensure that it's straight and inline with the axis of the bore. As for the crown, some gunsmiths and some bench rest shooters no longer recommend any crowning at all, they claim that crowning was just a way to avoid damage to the lands and groves at the muzzle and since there is a flash suppressor on the muzzle the front faces of the exposed lands are protected, so I wouldn't worry too much about the crown unless the actual angled face has dings in it. ![]() If it were my rifle, I would clean up any marks on the face of the muzzle with a stone. Anything that causes there to be uneven pressure on the bullet as it leaves the muzzle will not help your groups. The finish of the muzzle will always have an effect on precision and accuracy but the fit of the flash suppressor will also be of importance. I'm not a gunsmith so don't take my comments as being from one, but I've read that some people don't recommend re-crowning a chrome lined barrel because you can create chips in the chrome and that would worsen your accuracy.
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