I've done a lot of "pig shootin" (mostly a mix of feral and wild pigs) in Texas. I've used everything from a 30-30 and .270, to a 45-70. The 45-70 was a tad too much though and had a good "kick"
Just wanted to shoot it.
Thought about using this, but it is a bit much.
http://www.youtube.com/watch?v=xohy9gWz7kk
Also used a black powder .50 cal before. Those are fun, as long as you remember to put powder in before the ball......
