9mm can, 30cal can, or both
I’m thinking about getting a 9mm can so I can shoot 9mm, 300 blackout and 7.62x39 through it. Is it better to just get a dedicated 30cal can for the 300blk and 7.62?
I understand that 9mm has a bigger bore than the 7.62 rounds but I’m not sure if there’s a noticeable difference in noice reduction with a slightly bigger bore size