Hi all I was just worunding if anyone could tell me if a .730 size slug would fit iside a new 12 gage shot shell. I have been working on building a 12 bore dubble and would like to use the # 399 nie mold when it come time to refulate it but doin't know what the inside of the shell will take. if that is to big to fit what is the largest that could be used? Thanks Tom N