I just bought a CZ 452 FS .17 HMR with a Leupold scope, but I haven't used it except to sight it in. It's mostly for crows that hang up out of shotgun range, but I'll no doubt use for squirrels at some point.

My favorite is a 39A with CCI SGB ammo. Grandpa's Savage M19 NRA match rifle has to get a turn once in a while, just for old time's sake, and I will eventually try out the Remington rolling block .32-20 I picked up a while back.