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Old January 5, 2013, 03:02 PM   #1
327 FM
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Small magnum pistol primers

Is there any reason that I could not use small magnum pistol primers for standard 380 and 40 S@W loads?
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Old January 5, 2013, 03:12 PM   #2
steveno
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you should be able to but if you already have a load established you should back the load down 10% to 15% and work back up. those two calibers would most likely use standard primers in any loading manual so those loads should also be worked up to as well
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Old January 5, 2013, 03:16 PM   #3
Hammerhead
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Yup, switching to magnum primers will increase pressure, especially CCI magnum SPP's.
You need to back off and work back up, and watch pressure signs closely.
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Old January 5, 2013, 06:44 PM   #4
fehhkk
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I reloaded 40S&W with CCI550, 5.0gr of Bullseye powder at 1.120" and they felt great.

Yes, you can use them, but like said before, careful at the top limits. Start at the low limit and work it up.
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Old January 5, 2013, 07:37 PM   #5
m&p45acp10+1
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Start at the starting load, and work your way back up. With some guns you may need to load a few test rounds to assure your firing pin will hit hard enough to fire the primer. Though I load all of my small pistol loads with small rifle primers. I started at starting loads, and worked up the loads.
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