Let me suggest using CCI's Quiet 22 ammo. It uses a 40 grain bullet with about 700 fps muzzle velocity IIRC. The action of the rifle is louder than the bullet report, and it will penetrate a,piece of sheet metal. I have no qualms about using it on a rabbit, but would check its aim versus your regular 22 ammo. It does work in a ruger 10/22, but as a single shot, since it won't work the action. I would buy a box and try it out. I keep about six boxes on hand.