I got the mark 3 a couple years ago and liked everything about it except the failure to feed problem. The sharp feed ramp would cut into the head of the bullets and jam. When I got it, my walmart always had the federal bulk packs and it would work perfect with them. It would not work with the remington goldens or the winchester bulk pack. The local walmart hasn't had any federals in ages so I had to quit shooting it. I called ruger and told them the problem and he admitted they had a problem with them for me just to shoot the federal's. They also told me to send it in and they would look at it, but after sending my p345 back and sending my lcp back and sending my bearcat back and sending my redhawk back, I am tired of sending them back. As long as they have been making the ruger 22 auto, you would think they would have it figured out by now. At any rate, I sold it today at a loss and I did tell the buyer that as long as he shot federal's it would work fine but good luck with any other ammo. By the way, the single action's work with any ammo always.