As for timing muzzle brakes...can’t you just grind or file down the shoulder of the brake so it meets the desired alignment with the rifle? I have precision armament washers that time my brakes, but would rather not use them if this grinding trick works.
The potential issues with this is poor alignment due to imperfect filing, poor interface between brake and barrel shoulder, and achieving the proper thread engagement in the brake. Unless the brake is close to being timed perfectly, you also have the potential to "bottom out the threads" on the brake before the brake shoulders up against the barrel.
I personally wouldn't recommend filing it. It's an imperfect and unelegant solution, and could induce issues. Being off center could result in erratic groups and fliers, and at worst could cause bullet strikes in the baffles or end caps of the muzzle brake. Not being properly shouldered could result in the frustration of having your brake constantly come loose - also resulting in downgraded precision down range. I wouldn't be surprised at all if you encountered poor results if doing so. File at your own risk.
I'm not a gunsmith or a machinist, but seems like a poor idea to me. I wouldn't recommend for anyone to do it on a bubba'd up Lee enfield, nevermind a precision rifle.
Edit to add: the last thing the bullet is influenced by as it's leaving the rifle is the muzzle brake (if one is installed). Imprecise mounting of the muzzle brake can and will influence the bullets flight. We go through all these pains in a precision rifle to make sure that the components we are using are held to tight tolerances to ensure we are optimizing precision down range. I think it's silly to compromise that by taking shortcuts at the muzzle in order to save time or costs.
If you want your brake precisely timed to shoulder up against the barrel, do it right and have a good gunsmith do it. Or leave it as is.
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