I own a Surgeon 591 Repeater chambered in .308 and it has a fixed 20MOA base built-in.
I am looking for a rifle scope and was focusing on the Schmidt and Bender 3-12x50 or a 4-16X50.
However, I read on 6MMBR that those two scopes require a 29MOA base or you would have zeroing problems as well...