God put man on earth to manage the wildlife. The snake will bite the man, sometimes without provocation (I understand there are some in places like Australia that will chase you down, and you ain't outrunning him). So, they're fair game. The most disconcerting ones are the rattlers you hear closeby but cannot see. You know he's ready to strike, but where the hell is he?
I used to use an old Ballester-Molina in .45 Auto that digested CCI shotshells with aplomb, and I'd consider this to be the minimum for rattlers if using shot. I mostly shot tin cans with that old Argentine .45 and never had to use it on snakes. Most rattlers don't want a piece of you any more than you want to meet up with them, but getting bit isn't something you'd want to endure. Their spit gets in there and rots your skin, horrible.
I used to use an old Ballester-Molina in .45 Auto that digested CCI shotshells with aplomb, and I'd consider this to be the minimum for rattlers if using shot. I mostly shot tin cans with that old Argentine .45 and never had to use it on snakes. Most rattlers don't want a piece of you any more than you want to meet up with them, but getting bit isn't something you'd want to endure. Their spit gets in there and rots your skin, horrible.