LOL!
Guns for snakes? Really?
C'mon! I'm a gun guy just as much as the rest of ya, and I grew up in Western Diamondback territory (any other Northern California boys and girls out there?), but Krochus hit it on the head!
You don't need a gun for snakes. Shovel, hoe, axe, machete all work fine!
Helpful tip--I've never seen a rattler strike distance longer than about half their body length, and these aren't real big snakes. Last rattler I dispatched was almost four feet--a really fat SOB--and I just smacked him with the shovel a couple times, then used it to sever the end that had the sharp, oozy things in it. He tasted great! The secret is dry mustard in the flour. Trust me--and soak 'em in buttermilk overnight first.
Had a German Shepherd that took a diamondback strike to the chest, envenomed...cost about $2200 to fix that dog, but well worth it. I killed the travelers (rattlers, not flatlanders) that got too close to the house, but let the ones I came across in the wilds go. Figured I was the tresspasser.
I used .38 snakeshot once, in a little SP-101 2". Had to get too close for that to be effective, and the shovel was just a lot easier, quieter, and frankly, more effective.