Hi Mike,
I finally got the drilling back from my smith and the firing pins do now retract after firing. First off I have made up 10x loads with .318 bullets from S&B on the new SHM cases that look to be of the same form as some old .318 RWS bullets I had found, the story here is that RWS sold the worn out tooling to S&B so some range time will tell. I am also loading 10x of the H&N copper plated drawn down bullets to use first for checking the B Nickel / Marburg variable scopes present alignment.