marcodo,
the Boxer primed case has the flash hole in the center of the case. the primer has a small piece of metal, the anvil, pressed into the priming material from the open end of the primer cup.
the primer is pressed into the opening of the case. when the firing ping impacts the outside of the primer cup the priming material is trapped between the anvil and the primer cup and is ignited.
the Berdan primer has the primer cup filled with the primer material, the anvil is formed into the case between two small flash holes that are located closer to the perimeter of the primer pocket. the center of the pocket has the anvil occupying the space where the "normal Boxer primer" flash hole would be. thats why the pin broke and bent the decapping rod.
it requires special decappers for Berdan primers, most of the military surplus ammo of European manufacture, is Berdan primed, but not all. some ammo is produced in Europe under U.S. military contracts, and this ammo will be Boxer type.
if you shoot alot and with the price of reloading components being the highest of all time , scrounging brass from the range is a source of free brass, a small flash light is very helpfull for checking for Berdan priming as it is hard to detect from the out side . as Doug B stated look inside for the two small holes.