This case is very similar, except for the difference in length, to the .30 Mauser. Due to higher operating pressures, if the .30 Mauser cases are fired with hotter 7.62×25 loads in the CZ-52, it will tear the neck off some cases. 30 Mauser O.A.L. is .980″ to .985″ while 7.62×25 O.A.L. is .958″ to .962″. We recommend using bullets of .308″ diameter in our brass.