i have and it is quite random. sometimes it will grab the shell, and eject it from the chamber and sometimes it will not. the best i can make of it is maybe the bolt assembly is not grabbing it. it just doesnt seem to hold the shell "tight", thus the used shell dropping onto the new shell and jamming. and for some reason that 2 3/4 seems ok, which is fine for the ol orange birds, but i know the gun is much better than that