Well that's one I've not heard of. I knew that company's experimented with the small and large rifle primers for a bit. Kahnke, Marksbury,or Knight started it I think. There were nipples for small rifle primers and large rifle primers. Of course then Knight came out with the Disc and then everybody rushed to get a 209 gun into the market and they fell by the wayside for the most part. I think Kahnke and Marksbury stuck with them only to be eclipsed by the companies that went 209. Ironically the rifle style of Marksbury and Kahnke is what everyone is going to.

Now we have PR bullets claiming that the small rifle or pistol primers are more accurate than 209's. I don't believe that but the 25 ACP ignition does keep my Omega cleaner.