My collection of .22lr pistols includes Ruger Mkii (2), Ruger Mkiii (3), S&W Models 41 (2), S&W Models 422 (2) and a Hammerli Xesse Sport. I think I have a couple of others, can't remember their brands just now. Also shoot a Ruger 10/22 and an Auschutz (sp?) bolt action. Most of the time if I keep everything clean and either coated or uncoated ammo works/feeds OK. Recently, I been shooting Aguila Super Extra HV 40gr coated with Ely primers, have almost used 10,000 rounds without any issues. Had used more than 15,000 rounds of Armscor 38gr HVHP with minimum random problems. Recently, using a new 5,000 round batch of Armscor I've experienced a 6% rate of failure to fire, all fed OK.
Folks tend to say certain guns tend not "like" certain ammo. Or, certain ammo seems to work better. Perhaps they're correct. I suspect I've been lucky with the guns I bought. Cleaning the guns regularly surely helps. I do lean toward the idea that certain ammo works better. CCI, Aguila (coated and uncoated) along with Armscor (until this last batch) have worked well for me, therefore I've stayed with them. I don't like this recent 6% failure experienced with Armscor, Since I bought 5,000 more rounds of it I guess we need to talk.