I am just run over with turtles so today I went out with some CB caps and my trusty .22 rifle and popped a few. I have close neighbors on both sides so I don't want to make any loud gun noises so what would be a better rifle or bullet to use? Would an air shot rifle fit the bill? I can't tell just how good I am doing shooting in the water with the CB caps. I know I got a few but I am not sure what my success rate really is. Will the bullets deflect off of the shell? I need to be able to make shots out to about 40 yards or so, quietly. What do you guys suggest?