Can I substitute a magnum large rifle primer for a standard large rifle primer? I would like to use them in 6.5 Creedmoor over Varget powder.
What Gary said,You should only get about 19feet more per second mag. vs. std. primers
Yes , but drop the powder charge back a grain , especially if you are loading at maximum charges , just to make sure you don't bump up pressure . Shoot a few groups , look for excess pressure signs and adjust load as needed .
A few years ago the primer shortage had many using magnum primers when it was all they had/could get . It bumps pressures up a little so the caution to drop back and work up .
Gary
I really enjoy reloading but it can be so inexact.
Whatever you do, tread cautiously and amp up slowly.
I have seen 100fps muzzle velocity swing just between lot numbers (same powder charge) of h4350 in 6x47 loads.
A lot of misinformation out there.
Just because it says magnum don’t mean it goes faster.
We have this question all the time. What we time folks is magnum doesn’t necessarily mean hotter.
Mickey has loaded more primers than any ten regular shooters, he speaks from years of experience.
Bryan
Only 19 fps , yes that sounds correct ...I knew it wasn't much but some reloader's just went off the deep end claiming several hundred fps and horror stories of excess pressure exploding rifles by simply switching to magnum primers .
Thanks for the input .
Gary
That is even more than what was recorded when we tested some custom rounds I made up years ago. I wouks, say on some case's it just cleaned up the loads and made them more accurate. Shooting on a day with different water did more.
In one case a low power load of Varget and 4895 the magnum primers in 30-06 did just that. The mag used gave a cleaner burn and also made them more accurate. It was a,win win
Yeah,Years ago someone posted their results on BS, Was that you by chance?