Never mind about the extra barrel question. I'm pretty sure that the recoil would cause the stock to crack. So here's another question. Could I use .310 BUCKSHOT(#1.5 buck size) as round ball ammo? There's a 8 lb jar on Ballistic Products that has 1,280 lead buckshot for $40 vs Hornady .310 balls 100pk for $15. I'm trying to find a cost saving ammo as I am on an EXTREMELY tight budget. And would I need a .10 patch or .15 with .310 round balls.