Here are a few pictures of my workshop when I was converting Russian Steel 12ga. Hulls to use 209 primers and shortening them from 2.75 inches to 2.50 inches to use in my 1887 lever action shotgun repro.
In the above picture, the shells on the far left and far right are unmodified Berdan primed hulls. The one in the middle has a #209 primer seated in the hull replacing the original primers. Note the headstamp markings. The center one tells us that it was manufactured in December of 1992. December 1993 is the date on the outboard hulls. Also note the icon that tells the shooter tha