I like 22Mag, one friend shoots the HMR. We've clobbered groundsquirrels and the splat factor is about identical. But the mag does have more power, it just does. My gun likes Win. 40JHP and chews ragged hole after ragged hole at 50yds. I'll mostly use the 17AH now, even on squirrels, and it just flat blows the crap out of them.