For when you only need one shot, there's the Rossi Brawler. You can throw down on anything from rattlesnakes to medium-sized game thanks to the Brawler's ability to fire either 45 Colt or a 410 shotshell. Plus, with the integrated picatinny rail, you're also not stuck using one grain weight ammo. You can attach an optic of your choice to the Brawler and zero your point of impact exactly.