Use of magnum primers is more related to your choice of powder than to whether the cartridge/chamfering has a "magnum" designation or not. Slower burning or ball powders may benefit from the hotter flame of the magnum cap. They can be used for powders that don't "need" the magnum primer, too - but you should reduce loads to starting load level and work up, watching for pressure signs.
I currently find myself in possession of 5000 large pistol magnum primers, although I don't load any powders in my handgun loads that really need a magnum primer. But as scarce as primers are right now, I think I'll just sit on them, and if need be, I can use them with my usual powders - I'll just have to recalibrate my loads.
Last edited by 6GUNSONLY; 01-09-2021 at 04:35 AM.
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