Reloading Berdan brass is the last-ditch option, for brass that is not obtainable otherwise.
2 challenges:
1. Decapping. There are 2 ways I know of and tried - the claw method, where you pierce the primer and lever it out with a hook. The hydrostatic method (water cannot be compressed) relies on filling the case with water, and smashing a piston into it within a sealed case to drive the primer out. Do you like squirt-gun fights? You will love hydrostatic decapping!
2. Primer source. Since the Dangerous Dave Sutherland, aka Old Western Scrounger - retired, I have not seen any berdan primers for sale in the US. They were expensive even when available. I read of PMC importing the Berdan primers several years ago, never saw any for sale.
I used to reload the Swiss 7.5mm military brass before the Norma-made boxer primed brass became available. Never again.
LT