Magnum primers in 45acp, any danger?


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jeepmor
January 20, 2006, 05:46 PM
All,

I am wondering if magnum primers are okay to use in 45acp or if it will create overpressure, and therefore be very dangerous. I know the 45acp is rated to 22kpsi while most magnums are in the 35kps+ range, so this is why I post the question.

I did a quick search and did not find any used in favorite loads statements. So I'm thinking they are probably a big no no, but had to ask if anyone has any experience or has tried it.

Being we're talking about guns here, I don't have any intention of uselessly testing this theory for the consequences could cause injury or death, with the least being a broken firearm.

All feedback appreciated.

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taliv
January 20, 2006, 07:06 PM
no, but start low and work up, as always.

i have a load or two that i use magnum primers for in 45acp for no other reason than when i went to the shop, they were out of standard, so i had to buy a couple thousand magnum. i usedthem up a long time ago and went back to standard.

jeepmor
January 20, 2006, 07:41 PM
Okay, so the gun doesn't go dangerously over spec, if at all, with Magnum primers. Great, I will try some since I grabbed one in a batch the other day, then thought, I best ask first for safetys sake, it's not an airsoft, it's a pistol.

I wonder if it would have given my target Lead Cast 200 RNFP Bullseye powder loads from another thread a little more umph cycling the action. Have to experiment a bit more and start a journal.

Thanks again,

jeepmor

PS - no more umph, but better cold weather ignition, I'm sold. It was cold this week when we shot and I had normal primers in place. I'll load another batch of target loads with a little more bullseye and magnum primers and take it up shooting in snow country for a test. I snowboard weekly, won't be an issue there. In oregon too, so no deep freeze, just below freezing on average.

meinbruder
January 20, 2006, 11:53 PM
I wonder if it would have given my target Lead Cast 200 RNFP Bullseye powder loads from another thread a little more umph cycling the action. Have to experiment a bit more and start a journal.

No, no more umph. Magnum primers will give a better ignition in cold weather; I load them by choice just for that reason.
Mike
Portland, OR.

Sport45
January 21, 2006, 09:59 AM
Every .45 I've loaded in the past 5 years or so has been with a magnum primer. I only use Winchester primers for handgun calibers and in the large size they only come in "For Standard or Magnum". So I guess you won't have a problem.

45crittergitter
January 22, 2006, 08:06 PM
Under no circumstance would I use a magnum primer in a load whose loading manual data called for a standard primer. Yes, it's probably safely doable if you reduce the powder charge, but then you don't know how much to reduce or where the limit might be. I've read of loads tested both ways where the simple substitution of a primer caused the pressure to be significantly above SAAMI max when it was perfectly safe with the standard primer. Sooooo.... wear out your gun, create functioning and case life issues, risk your eyes (or worse).... all to save a fraction of a cent on the right component. Not me.

Quantrill
January 23, 2006, 12:20 PM
I have found that target groups open up appreciably when using magnum primers. Quantrill

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