We apologize for the delay in response. With 22LR's, some ammo just will not like your firearm, or the firearm just does not like some ammo. Here is something you can try. Get a bore brush and attach it to a cleaning rod, then put the other end of the rod in a drill. Put some cleaner in the chamber and insert the brush. Turn the drill on and work the chamber for a few seconds and then clean everything up and try again. It may come down to just finding an ammo type that works and sticking with it. I have personal firearms (not AR's) that are like that as well. Please let me know if doing this does not help. Thank you for contacting us and have a great day.