My experience is that .22 mag rifles are each a law unto themselves - two of the same brand rifles made about the same time will each prefer a different brand and maybe even bullet weight. My Marlin 882 and my Dad's were like that. I am happy that mine likes the 40 gr Win Super-X. My Win 9422M likes the Win Supreme 34 gr load and outshoots the bolt guns. It likes the Maxi-Mag +V and the Rem light bullet loads but the Win groups best.
It gets expensive trying all the various loads out there to find the best one!
