My 22 WMR is a bolt action rifle. I use it on alligators because I've had several failure to fire events while using my 10-22 with sub sonic ammo.
Troy,
Remington subsonics perhaps?
If not Remington Sub's (which are basically crap) or the old (as in not available for the last 8 to 10 years) PMC 'Moderator', which are very good, just so low powered that they will not cycle a semi-auto action reliably.
If not and this is regular, something is awry.
Time to try and figure out what is wrong with your 10-22. Most likely you just need to 'Mod' your 10-22 bolt for subsonics. Out of several 10-22's, I have had only one that would not function with subsonics no matter what.
There are youtubes on how to modify the bolt, basically you are just radiusing the lower rear of the bolt so that it glides over/cocks the hammer easier.
Also a 10% lighter recoil spring would be helpful.
Hopefully you will report back here with your results using the 22 Magnum subs.
Jerry