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About LinkBacksWhat's the difference between magnum primers and standard primers? I'm going to be loading 9mm & 40S&W. Thanks
This is a discussion on Question on Primers within the Reloading forums, part of the Defensive Ammunition & Ballistics category; What's the difference between magnum primers and standard primers? I'm going to be loading 9mm & 40S&W. Thanks...
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What's the difference between magnum primers and standard primers? I'm going to be loading 9mm & 40S&W. Thanks
You'd use regular small pistol primers for those loads. You could use magnum primers but there is no benefit to doing so and you'll want to start at minimum and work your load back up.
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Some powders get better ignition with magnum primers. Your reloading tables should show which loads were developed using them.
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If magnum primers are what you can get a hold of right now, they'll be fine, but per TX expat said, you will want to start at the "bottom" and work back up. Magnum primers may cause pressure to increase vs standard primers, as they are "hotter", than standard.
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The difference--mag primers burn a little hotter. You certainly don't need mag primers for the 9 and 40 (now is the time for the read your manuals reminder), but they can be used. If you do, as already stated, work up those from the start loads.
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As stated already you don't need Mag. primers for the 2 rounds in question.
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