OK, as long as we're on somewhat obscure topics, I've always wondered about this one... Say I have an old Savage 22 over 20ga gun. Can I sit in my treestand and plink squirrels with the 22 and have a slug in the 20ga cylinder for deer? (Lord knows I'd have more meat in the freezer if I shot every squirrel I saw while waiting for a deer to wander by).