Originally posted by Hondo44:

"You haven't pulled the trigger, but the usual line is showing on the cylinder already probably from Bowan's testing/tuning. Not trying to be critical, but doesn't Hamilton put a mirror finish on the cylinder bolt to mitigate the line?"

My Bowen .45 Colt came with the beginnings of what rapidly became a pronounced cylinder line. I contacted Bowen who replied that it is a characteristic of some bolts to do that. He can polish and such to try to reduce the effect, but some guns do it anyway. He offered to refinish mine for me, but said it would just do it again.

I believe he is right. I bought a 5 inch 1950 Target in .44 Special from Jim Supica about 10 years ago and the "fine refinish" very promptly wore the widest turn line around the cylinder that I have ever seen.