I've seen those "circular growth rings" on new revolvers . It's the tool they use. And it's ok.
Sent from my SM-N950U using Tapatalk
I've seen PC guns with smooth, rough and circular.Just got a 686+ PC and my forcing cone is smooth no circular marks on it and gap comes in at .0035 to 004 on all the cylinders ..
And is not as rough looking as Bluedot37's picture of his Talo ..