I really don't know what the "drill bit trick" is...Please explain.
Its a restock of an previous built gun.
Mike I'll take a stab at the answer as I understand it. At top of post Dan said he had his barrel maker ream a tube to 20 gauge. It appears Dan preferred to machine the outside himself to know exactly where the taper transitions were, so that he could inlet the barrel channel using those dimensions and achieve a precise fit. Or at least that's how I read it anyway.Maybe it's cause I'm new but turning the barrel has me wondering about the temper of barrels. Doesn't tempering prevent machining? Or maybe the temper will be done at a later step? Or perhaps this type of steel does not require tempering. Either way, great thread so far, looking forward to following along. I love seeing this stuff it helps me better understand the process and mechanics of everything.