New to reloading...is there a difference in rifle primer sizes between European ammo and North American ammo. I.E.. 308win vs 8x57 mauser? Is there a chart that explains this?
It is kind of a two step process. You need to look up the primer size first on this chart for example. The 8x57 Mauser is a LR or Large Rifle. Then you can look up here to see what your various choices in LR are. LR and LR Magnum are the same size. Controversial subject as to whether or not there is much difference between LR and LR Magnum.



























