My .22 of choice is a Marlin Model 60. I don't LOVE the tube mag, but the micro-groove barrel makes for some super accurate shots. Plus, they're pretty reliable and also inexpensive on the secondhand market.

When I was a kid, my dad had a bolt action pump pellet rifle (don't remember the make) that was only supposed to be pumped three times according to the manual. If you went four or five, I guarantee you that thing was topping 1200fps. It was a beast. I want to get my hands on it eventually. I know he doesn't have much use for it anymore...