It will probably work, but why??
I've always felt that using a magnum primer in a cartridge like the .45ACP was a stupid waste of a magnum primer. I felt that way when primers were a penny each and the shelves were always full and you could get as many as you could afford and carry any, and everytime you went shopping, today with tremendous high prices and shortages it seems almost criminally waste full.
I'd save the magnum primers for cartridges and loads that need them. The .45acp doesn't.
Yes, you can adjust your loads to compensate for the magnum primer, so by doing that magnum primers can be used in everything with suitable loads.
But, the reverse is not true. Lighting off large amounts of slow powders and powders with difficult to ignite deterrent coatings are times when no matter how much you wish, standard primers don't do as well as magnums.
Consider this, in these shortage riddled times, somewhere out there is somebody who needs magnum primers and might have something worthwhile to trade... Like. maybe standard primers...
I have guns that use both, depending on the load, so I don't "waste" magnum primers on loads where standard primers do just fine.
That being said, its your stuff, its your money "waste" it any way that pleases you (and isn't prohibited by law
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