My UV isnt the most accurate, but I havent tried 'all' the ammo choices either, just the ones I want to use and they are 'satisfactory' for my purposes. IIRC, the 22 mag is not, typically, the most accurate RF anyway, so dont expect it to equal or best your match 22LR, but it does reach on out there with some smack.
FWIW, I like mine, and my 22Hornets and other high priced 22mags have gone. That said, where I in the market today I might well be looking at the HB Savage bolt gun with AccuTrigger; my 22LR version is a wonder right out of the box, box those arent 'traditional' single shots.