Does anyone out there know what these two tiny nodules are on the brass of a Lyalvale English Sporter 12 cartridge?
Curiously, I have other batches of English Sporters that do not have them and they look too clean to be a deformation.
I probably would not have noticed it, but they would not fit into the chamber of my Greener GP.
Looking at other cartridges I've used, none of those have it.
english sporter cartridge.mp4