I purchased a couple hundred rounds of one fired 223/556 mixed brass. I was able to deprime about 35 or so before the pin on my die broke. I have a set of Lee dies and they have worked for me in the past only using my own once fired non crimped brass. I ordered new parts but then thought that I may be using the wrong tool for the job. I know that some of the brass was military because of the crimped primers. My question is, are there recommendations on better dies to remove crimped primers from military brass?