Dave in WY has given the best bit of advice that nobody seems to heed until they've spent money on a non AO (Adjustable Objective) scope first! (For their target 22s) I had a Leupold VariX II 3x-9x that I'd sent to the Leupold shop to have it's paralax adjusted to rimfire distances. It was originally on my Marlin 880SQ. What a big disappointment it was, because even with the factory adjustments, I couldn't get a clear look at anything over 5x@ 25yds. Now, both the 880SQ and the Izmash biathlon have Bushnell 4x-12x AO scopes.....this is the perfect set-up if you wish to use over 5x at rimfire distances.
My two Ruger 10/22's both have 4x scopes....one a Weaver R4 rimfire 4x, and the other a Simmons 4x. Although the Simmons was intended to be used for hunting rifles, I don't see much difference between the two at all rimfire distances. Since neither of the 10/22s are intended for target use, I feel this is the perfect setup for them, as well.
Guys will try to tell you that an AO scope isn't all that important, until they get one......I was no different. I went through two rifles with 3x-9x hunting scopes, that were fixed AO, before I saw the light! I can remember even telling some people who'd tried to clue me in, that I didn't need an AO scope, because I can see clearly without it......NOT! Better late than never, and I'll NEVER go back to 2nd best!
hog