Berdan priming is just another way of lighting the powder, the Boxer priming used in the USA has the anvil in the primer, whereas the Berdan priming has the anvil in the cartridge. We are used to Boxer in the USA as it is easier to reload, Berdan can be reloaded but at much more expense and time.....I think you mean that your ammo is corrosive, please note that because it is Berdan does not mean it is corrosive. I consider most Eastern European and Chinese ammo to be corrosive, Swiss ammo is not corrosive and it is in fact Berdan primed. I clean corrosive ammo with warm water, some say Windex but it is mostly water anyhow! Windex offers some ammonia that can't hurt. I clean with water and then follow up with Hoppes and Sweets 7.62 to remove copper fouling.... Moly....:fuss: no comment!