Guys in my shop have been shooting .17HMR all summer. No pass throughs on ground hogs or coyotes from 50yds to 305yds(except head shots). That little bullet is excellent. Much better than 22 mag. Accuracy is incredible, most guns shoot under 1/2" at 100yds. It does need cleaned after about each box of ammo. We use boresnakes and it works great.

Ammo is a little high (about $10 here), but remember it is loaded to extreme tolerances. About like olympic grade rimfire.