I have a terrible habit of after having gotten some game with a gun, I pass it on to my son or grand kids. I have had several .22 mags and since friends often ask me to do initial sighting in, I have had experience with others. Probably until now, the best shooters I had in .22 mag were the Anschutz 141M. Back in the 70s the Marlins would put out pretty decent groups also. However, when friends asked me which one to buy, if they couldn't or didn't want to afford the Anschutz's, I suggested the Mossberg 640K, simply because of the ones I had sighted in. The old Mossberg rimfires had a good (and well deserved) reputation for accuracy.
About 3 years ago, I went to a gun show with some of my German cutlery and swapped for a Marlin 982L..the one with the pretty cinnamon laminate stock. I never could get that rifle to print right...lucky to get 5 rounds in side 1.75-2" @ 50 yards, I floated the barrel..tried other scopes & mounts etc still no improvement deided to forget any more .22 mags because accuracy is a "crap shoot" with them. I REALLY missed my Anschutz.

....Swapped the Marlin for a Savage 93, bull barrel .17HMR w/accutrigger...that gun is so accurate, I couldn't help but be impressed.
About a year ago, I was visiting a local gun shop..there sat a new 'bottom of the line', Savage 93F w/accutrigger. One look at the tag..I handed over $179 + tax, and it went home with me. I don't miss my Anschutz any more..this .22 mag will shoot right along with the Anschutz (likes WW & Hornady V-max). I do consider the accutrigger to be a real asset.
My NEF sportster in .22 mag shows some decent groups (best with WW ammo)..and the .17HMR barrel is very good.
Just my experience..yours could differ..
BTW: I had a Marlin 880SQ which I gave to my grandson..the rifle shoots with the BEST of them. I likes CCI standards real well. Remember though; like .22LR, the .22 mag should be tried with a variety of ammos.