OK, here is what I have determined. My Mark II has a very small chamber. With the gun torn apart and completely clean, Federal ammo drops into the chamber. All other ammo gets hung up. Remington and Winchester ammo get stuck 1/4 of the way in. CCI gets stuck 3/4 of the way in. Clearly, not all .22 ammo is the exact same diameter.
I would like to polish the chamber. Does anyone have any suggestions on how to do that???
I would like to polish the chamber. Does anyone have any suggestions on how to do that???