I picked about 55 brass and nickel plated 10 gauge shells to use for cowboy shooting. Keeping in mind these used either 57 primers or even older. When decapping them I found two different things I had never seen before.
A couple of the shells had the normal flash hole that you would expect from a boxer primed hull, but there was also two little holes on each side of the normal flash hole. Any idea why?
The second thing I found that some of the other hulls had a protrusion about 1/16" in diameter and a bit more than 1/8" long sticking into the hull from the primer, what kind of shotgun primer were these?
These are all either Winchester or UMC (Remington) hulls, so Berdan priming seems very unlikely.
