I was always under that impression too. Snake time always carry a Smith Mod 36 with the first round snake shot. We get some big ones out at the ranch. My wife is a die hard semi auto girl and she'd always carry the first round with snake shot too. We do carry becaues of some two legged predators too and so I was telling her the snake shot was gonna jam her up that it wouldn't reliably function her semis. I stand corrected. We were at the ranch and she ran a mag through both her Shield and her Sig 365. No problems at all. Course then Sunday I'm carrying my Glock 43 (without the snake shot) and miss the first rattler I'd missed in years. Geez did I hear about it.