Re: Firer lapping vs. standard barrel break in?
I'll say that Fire lapping 'polishes' out tooling marks & little thingys from CHAMBERING as well on a custom as factory. And it WILL NOT hurt a custom barrel one bit.
I know barrel makers say that break in isn't needed on their barrels. Some appease the crowd with a lame breakin procedure(which does nothing). Your custom barrels will shoot well without fire lapping I'm sure.
Mine shoot fine with it, and I have yet to see ANY loss of leade with my procedure. Absolutely zero movement.
Just use the finest grit(for custom), 10shots, and I clean between each shot(even though not per procedure).
TRUE BREAK-IN COMPLETE.
Later the leade gets ugly again, so followup to prolong accurate life.
I think it's a MUST for factory barrels. Just do it, don't worry.