ORIGINAL: Agshooter
Sorryifthis has come up recently here, but has anyone seen any noticeable difference (in FPS) in using magnum primers? I reload for .204, .243, .270, & 45-70 & would like to know if it will make any velocity difference if i switch to mag primers? I know it may cause a change in accuracy (good or bad), but i can work on that. Thanks -
Ben
I have seen velocity increases, decreases, and no changes at all due to the use of magnum vs standard primers. The effects of one over the other seem to depend on case capacities and powder type.
So far, the only round I have used magnum primers in exclusively has been the .416 Rigby, due to its huge cavernous case capacity. Perhaps some day I'll chronograph some loads in the .416 with standard primers, but I'm a little leery of hangfires with large charges of slow ball powders like AA8700....