Rattlesnakes are not pets but I don't know where to post my question. I have never shot a

rattlesnake. Instead I capture and relocate them about 2 miles up the road. However, I have captured 5 in less than two months. I think it's time for some culling but I don't own a gun so I need some advice. All I want is a gun that I can load snake shot into and shoot the target from 10 or more feet away. I want it lightweight and small in size, if that's possible. If anyone out there can recommend the type of gun and ammo I would appreciate it.