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Old February 26, 2013, 12:01 AM   #1
Join Date: September 9, 2009
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Small pistol magnum primer question

I've been looking into different recipes for .357 magnum load data and seen that a fair amount suggest magnum primers. To get to my question, I have a quantity of Tula/Wolf magnum primers, where the recipe calls for Federal 200. Would magnum primers of different manufacturers be somewhat interchangable?
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Old February 26, 2013, 01:08 AM   #2
Marco Califo
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Yes. Start below max load and work up.
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Old February 26, 2013, 07:58 AM   #3
Magnum Wheel Man
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^^^ agree
In life you either make dust or eat dust...
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Old February 26, 2013, 07:59 AM   #4
Misssissippi Dave
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I load my .357 mag rounds with a magnum primer even though it doesn't call for one. I started with Federal primers and switched to Tula when they ran out. It works just as well for me. My load is 10.2 grains of AA7 with a Montana Gold 158 grain JHP bullet.

The powder manufacture show a NOS JHP bullet using a Winchester magnum primer 9.5 to 10.5 grains of AA7 and Speer shows 10.5 to 11.7 of AA7 with a 158 grain JHP using a standard primer. You will notice you do use less powder with the magnum primer. I like the load with the magnum primer better so that is what I use. It burns pretty clean and is pretty accurate too. I shoot from a 4" barrel pistol. You will need to work up your load for your pistol to make certain it works for you.
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Old February 26, 2013, 08:23 AM   #5
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The only problem I have encountered when substituting mag primers is with target pistols with light action springs. I have put my favorite bullseye 14-3 up until supplies of components gets back to normal.

Mag primers have thicker cups.
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