I do not like the idea of reaming chambers. What is your idea about using fiber wads with AA shells and 1 oz of shot. I looked yesterday for a chamber gauge that would measure chamber interior, I could not find. I have been shooting 1oz of shot with AA wads in these guns which work ok. RST seems to out of a lot of shells. I can make my own. I do not think the mechanical engineer in myself would let run a ream down them.