Long decades back I went to the usage of CCI primers of the magnum variety. The sole exception is CCI bench relaxation primers for that 204 Ruger. Hence I have only one large rifle primer, one small rifle primer and only large and small magnum pistol primers to stock. "Supplied https://titusqmmmj.thezenweb.com/the-basic-principles-of-federal-large-rifle-benchrest-primers-69881397