Quote:
Being from Northern MN originally, I use Mag primers in everything except my Hornet and Bee. Mag pimers give reliable ignition even at -30 especially if your using ball powders.
Just work up loads again with the Mag primers.
AWS
+1
A friend of mine used CCI magnum primers in his Swift when using H380 powder. It was an extremely accurate combination for him. We used them in our .22-250's with H380. You just have to "adjust" your powder charge to insure that there has not been a bump up in pressures. In the case of our .22-250's, we had to drop the powder charge 1/2 grain.
And, some "magnum" primers will produce lower pressures and velocities than other "regular" primers with some loads. That's why you always want to rework your loads whenever you change primers, bullets, cases, seating depths, etc. ....... even powder lots, at least to verify there are no undesirable consequences from the component substitution.
