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Small pistol primers in AR ammo???

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Unread 08-02-2011, 11:10 PM
Silver Member
Join Date: May 2011
Location: In a Free State
Posts: 187
Small pistol primers in AR ammo???

I went into the reloading room to finish a batch of rounds for my M4.
When I reached for the box of small rifle primers it was actually a box of small pistol primers.
I cannot be sure that I accidently used the small pistol primers instead of small rifle primers, but as I re-played the day before in my head I just might have grabbed the small pistol on accident........

The load is
LC brass
24gr H355
light crimp.

I have loaded up to 26gr of H355 in this M4 int he past so the 24 gr loads aren't too hot.

My question is........should I cautiously test them out to see if they work, or disassemble the whole batch....

ps I was tossing them onto a pile of about 1500rds so It would be hard to find all of them.......stupid I know.....

please advise.......


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Unread 08-02-2011, 11:18 PM
Gold Member
Join Date: Dec 2008
Location: Idaho Falls, Idaho
Posts: 582
Re: Small pistol primers in AR ammo???

I know you're not gonna like this, but I would disasemble them. They aren't as strong or hot as rifle primers andare meant to ignite charges of 4-10g, they shouldn't be trusted. They can cause delayed detonation which can lodge a bullet in the barrel and spike pressures causing case rupture. Don't take a chance.....When in doubt disassemble them. I know this stinks, If I had a nickle for evey time I did stuff like this........well any way good luck.

Last edited by Dano1; 08-02-2011 at 11:23 PM.
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Unread 08-03-2011, 11:43 AM
Silver Member
Join Date: May 2011
Location: In a Free State
Posts: 187
Re: Small pistol primers in AR ammo???

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