Free: Contests & Raffles.
If your going to shoot paper, plink or hunt edible small game, I'd stick with the 22lr. If you want to stretch it out shooting sage rats, rock chucks or crows I'd opt for the 17 HMR, if your intentions are to include bobcat and coyotes I'd go 22 Mag. Decisions Decisions, aren't we lucky these are the things we have to decide on. AWS
The 22 is cheaper to shoot. The 17 is likely to be more accurate past 50 yards. The 17 has a much flatter trajectory.