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Old April 6, 1999, 12:47 AM   #2
Mal H
Join Date: March 20, 1999
Location: Somewhere in the woods of Northern Virginia
Posts: 15,436
And sometimes old farts are exactly that. There are at least 3 reasons you shouldn't do this.

1) Rifle primers are more powerful than pistol primers because they have to be when used with large capacity casings. I recently did an experiment with pistol vs rifle primers, small and large. I shot some rubber primer-powered bullets across my chronograph. The rifle primers yielded considerably more velocity. So you would be on your own if you try to extrapolate a "good" load based on any published loads. Injury to you, your gun, or anyone next to you is possible if you guesstimated wrong.

2) Rifle primer cups are made with a harder alloy since rifle firing pins generally hit the primer with more force. There is the possibility that a pistol firing pin may not ignite the rifle primer or even worse you could get a hang fire. Is this a high probability? I don't think so, but why take the chance?

3) Why do it? Have you had any problems when using pistol primers in pistol cartridges?
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