I make my custom brakes from 303 Stainless. If they are going on a blued barrel, I bead blast them and DuraCoat them either gloss or flat black to best match the barrel. I also don't use crush washers. When I single point cut the barrel threads, I dial in to the bore in a 4 jaw chuck. When I make a batch of brakes, I bore them all to 0.250" which will work nicely on all .224" bores. If the brake is going on a larger caliber, then I bore and aim for 0.025" diametrical clearance. Rather than using crush washers, I prefer to take a skim off the muzzle shoulder to properly "time" the brake. For sporter barrel brakes, I thread 1/2" -28 TPI.

