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Old October 21, 2001, 06:55 PM   #1
Swamp Yankee
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9mm +P Loads

Looking for data on 9mm +p loads. Checked Speer, Lyman, and Hodgon with no luck. Anybody got a source?
Want to load 124 and 147 gr FMJ.
As always thanks in advance for the responses.
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Old October 21, 2001, 09:42 PM   #2
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Actually, anything in any manual over the max listed is +p

+p is nothing more than "over pressure" sorta & really has nothing to do with added velocity. I've seen some published +p data that was well short of "standard" velocities.
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Old October 21, 2001, 11:21 PM   #3
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+P indicates peak pressure of up to ten percent over SAAMI spec for that cartridge.

As Labgrade direct indication of projectile performance. Browse through some loading data and note that often a lower pressure load will outperform a high pressure load......difference being the powder used.

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Old October 22, 2001, 05:53 AM   #4
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They call me "MAJOR NINE"...............

AA5, Power Pistol, WAP, 3N37........

Chrono required.
"all my ammo is mostly retired factory ammo"
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Old October 22, 2001, 06:04 PM   #5
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Need to rephrase and regroup.
Loads not for handgun.
The ammo is to be used in a Special Weapons SW-5 carbine. It loves the factory 9mm +P and +P+. Standard 9mm cycles the action but its sluggish with the occasional jam.
I want to duplicate the +P loadings, upping the pressure to get better performance from the action. That factory ammo is expensive. Was hoping to find a starting point or some leads as to where to read up.
Worked up to 6.4 grains PowerPistol with 124 grain FMJ. (Speer Max Load), No ruptured cases or flattened primers. Been maintaining a COL 1.125 +.005/-.003. Using Lee Factory Crimp die. The carbine's action cycles but still somewhat sluggish.
Thanks for the help, appreciate any input.
Take Care
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Old October 22, 2001, 06:26 PM   #6
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Swamp Yankee every gun is a law unto itself for what it will handle, especially when you get up into the +P beyond published data territory.

Your best bet will be to use a chronograph and work up to whatever load you're looking for using that particular carbine. If it were me I would start with the hottest standard pressure data I could find and go from there.
Molan Labe!
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