So last summer I reloaded a buddy of mine some 300 Win Mag rounds, and I used CCI Magnum rifle primers cause I didn't have any Fed 215M. Well since then I found and bought the Fed 215M primers and I loaded him up some more rounds this summer, and they are shooting 4" lower and 4" to the right than the rounds with the CCI primers. Is this common with just the swap of the primer? everything else in the load was the same. if anybody has any insight on this that would be great as I didn't think it would change it that drastically.