A lot of true statements in this thread including the ones referring to slugo's
Too, this by oneounceload
FLITZ is a serious abrasive polish
Proven by the fact that slugo
shoots his Colt and there's no 'turn mark' on the cylinder. Turn mark on cylinder ='s scratch. The only way to remove that scratch is use an abrasive polish which removes metal material on cyl. down below scratch depth....
...sooo, it makes sense that repeated, multiple Flitzing of the front of the cyl. would, in time, affect cyl. gap.
Careful with the Flitz.