I like lower-power scopes for most rimfire work, whether that’s hunting or target shooting. A 2-7-power or even 1-8-power will give you all the magnification you need for most purposes. But if you’re interested in the precision rimfire competitions, then you’re going to want more magnification to really see the nuances of distant targets. For those times, I’d go with a 5-20-power or 4-16-power range, and make sure that precision target scopes also have manual focus—often called parallax—to bring targets of whatever distance into crisp focus.