.22's, rifles or pistols, are daft things. No two, even two identical firearms, will shoot the same ammo, the same way. Some of 'em are more particular than others too. Smith Model 41's are notorious for it. Great pistols, but very picky about the ammo.
You have to try a box of as many brands as you can to find the ammo your pistol both shoots well and cycles the action. The price of said ammo means nothing either.
You should try target velocity ammo. HV .22's are for hunting. They won't bother your pistol though.