Originally Posted by hareebrownbeest
You know i was reading about the "stinger" rounds. Thats what i was using. I should have been clear on that. I guess its slightly longer than a normal shell, or so i read. Maybe thats why the shells would not eject.
No, the bullet is smaller, so the overall cartridge is normal length. Stinger should work fine in an MKII. Rule out a sticky chamber. Scrub the rifle clean, and give the box of Stingers a tiny puff of RemOil. See if it helps any.