When I first got my SR22 I had a lot of stovepipes and double feeds. Then I swapped out the extractor (got one on amazon) and after that, the 10 rd ruger mag NEVER stovepiped or jammed. The butler creek mags were still finicky for a bit but I read somewhere that they need to be "broken in" so I ran about 200 rds through one and it gradually had fewer and fewer problems then none at all.
For the HCR mags, I found that if I put those 'extra 5 rds' in, I have lots of problems but if I just go with the 20 rds from the stripper clips, zero problems.
I also have some 110 rd drums, the first load through each one had some stovepipes but after that, no issues.
One problem I found was that the little plastic piston thing that is supposed to hold onto the mags wasn't engaging properly and if the mag was in too far or not far enough, I got jams. I swapped that out for a metal piston with a stronger spring (I think it was a kidd kit?) and a longer mag release and the problem went away.
I've been shooting mostly CCI Blazers, it seems to really like those
Just fyi. the gun we are talking about is not the SR 22. That is a mechanically better designed gun (for cleaning and maintenance) and is made by Ruger. We are speaking of the Anschutz MSR Rx 22 which is made by ISSC with an Anschutz barrel and trigger.