Ok, a lot of good info here to say the least and I have not read ALL the answers. That being said. With semi autos, and I have seen this time and time again, if your grip becomes weak, for whatever reason, misfires can, and DO accure. Otherwise known as ' limp wristing' sometime you dont even know your doing it. I would look there as well. I wont even buy any Remington 22's, even if they were giving them away. Years ago, before I knew better I bought several bricks -- took me forever to use them up-- never again ever!! Maybe just me, but I dont think so. a dirty gun, yes, most definitely can result in such problems. Weak springs?? well maybe, but I doubt it. JMHO