A similar method was posted somewhere using a specially made cup that the base sits in, and a tight fitting rod goes into the top of a water filled case, and you smack it with a hammer to pop the primers out. Exact same principle.Berdan primers are fine if you know how to remove the old ones. On our standard boxer primer removal you can't. I have heard of a way to remove them that showed a rod that fit really tight like a long bullet. This was hooked up to a single stage press. The cartridge case was filled with water and the rod was forced into the case quickly blowing out the primer. Of course you have to do this outside.
Berdan primers are fine if you know how to remove the old ones. On our standard boxer primer removal you can't. I have heard of a way to remove them that showed a rod that fit really tight like a long bullet. This was hooked up to a single stage press. The cartridge case was filled with water and the rod was forced into the case quickly blowing out the primer. Of course you have to do this outside.