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I guess I have gotten away with bad behavior according to recent internet posts here and elsewhere. I have fired some thousands of 9mm P loaded with small rifle primers and no misfires or blowups. Of course I do not load to the maximum in the first place.
I do not have a pressure test rig, but I do have a chronograph and have found that with the same bullet and powder charge, a small rifle standard primer gives higher velocity than a small pistol standard primer but LESS velocity than a small pistol magnum primer.
At one time Federal recommended their small rifle primer for use in .357 magnum because they did not then make a small pistol magnum primer. They do now, but that does not mean the rifle primers have changed.
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