Berdan Trivia
Back before the shooting sports were quite so repressed in England, there were a couple of domestic reloading equipment makers. They had some interesting designs for Berdan decappers that have since dropped out of sight because there is not enough business at home and we can't get the primers to replace the ones their gadgets remove.
There was the Hydro-Punch which was hydraulic with less splash. It put a nozzle firmly against the flash holes inside the case. Whacking a plunger with a mallet opened a little valve and let water under pressure enter the flashholes and push out the primer into a hole in the support base. Claimed to use only "two or three drops" per case.
There was a pin-type decapper. It looked like the usual Boxer decapping rod except that it had two small pins and came with a little spanner to adjust their spacing to match the flash holes in the cases of interest. Screw it loosely into a die body and run a case up slowly, wiggling the rod by hand and feeling for the pins to enter the flash holes. Then lean on the handle to punch the primer out normally.
The wildest was the Power Punch. It also put a nozzle against the flash holes inside the case, only this nozzle held a fresh primer. I recall it used Boxer primers because even then they were cheaper and more commonly available. Rap the firing pin with a mallet, fire the primer, and blow the old Berdan primer right out. The case was set in a steel base to contain the spent primer, of course. So every shot cost you two primers, one to blow out the used one, and one to reprime. Worth it in a Safari caliber, I would say.
