A friend of mine gave me a chrome model Jennings J-22 when he was leaving Alaska and didn't want to hassle sending it to the 'lower 48'. He said it jammed on a somewhat regular occassion, bought an extra magazine (non-factory), and it still jammed at regular intervals - so he just put it in a drawer and forgot about it. Anyway as he's packing to move finds the gun and gives it to me w/the 2 mags, then a week or so later tells me he found the original small card board box for it and drops it by. ***Inside is one slip of paper, that appeared to be blank, but when I pulled it out it said something to the affect "recommended ammo: CCI Stingers". Well low and behold when I loaded it w/only CCI Stingers it worked great every time - rapid fire, slow fire, etc!!! Another thing I did to help assist w/reliability, as you load each round make sure the rim of the round on top is just in front of the rim of the cartridge below it. I ended up selling it to "upgrade" my pocket gun to a Kel Tec 3AT (.380), kind of regrett selling it now, would have been a great one to just leave in my truck or.......