Pretty slow at 450fps.
A decent pellet gun shoots 1200fps.
Would be fun to play around with though.
Anything above 350 fps will pierce skin. You can pierce a skull at 500 fps. I think this BB gun has more than enough power to do damage and be dangerous. Still thinking about getting one, as I found that the Tractor Supply Co. here in Newberry has them for 200.00. Stopped in and took a look, and I gotta say, they look fairly impressive and like they could be a lot of fun. I guarantee that if you have a problem animal running around your yard, this will make them think twice about coming back if shot at.