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Posted: 9/7/2010 1:37:11 PM EDT
I accidentally loaded 100 rounds of plinking 45 acp for my 1911 with large rifle primers instead of large pistol primers.

They are mixed in with the good ones.

If I shoot them...

Will they function in a 1911 without problems?

Will they slam fire?

Will there be any problems during ignition?

Or should I find them and disassemble?


Link Posted: 9/7/2010 1:47:16 PM EDT
Lg Rifle primers and Lg Pistol primers have different dimensions. Considering the 45 ACP is such a low pressure round I would just shoot them up. If they fit in the pockets just fine and are not loose or setting high ... then there shouldn't be anything wrong.


Link Posted: 9/7/2010 3:41:38 PM EDT
Smart thing is to pull down the ammo.
Link Posted: 9/7/2010 4:18:38 PM EDT
IIRC 1911 Smith said he used Small Rifle in a .40.

WTH - what's the worse that can happen?

We're talking a whole $40 right
Link Posted: 9/7/2010 5:32:16 PM EDT
A chrono should be handy right about now. Loaded some 400+ rounds with small rifle primers. Sure enough. We chrono;d them and noticed a 20fps difference between small rifle and small pistol. Large rifle primers will work fine if your firing pin or striker fired pistol can ignite them. Rifle primers have a thicker cup. ... I say you should be fine, that's if your load is somewhere mid range to low.
Link Posted: 9/7/2010 6:36:50 PM EDT
Small rifle primers are DIMENSIONALLY IDENTICAL to small pistol primers. This is NOT TRUE of large rifle and pistol primers. One (can't remember which) is taller than the other, leading to high primers in one incorrect application and too-deep primers in the other.
Link Posted: 9/7/2010 6:38:49 PM EDT
I primed about a dozen .45 cases with LR by accident a few days ago. I noticed they weren't seating properly and a few were quite high.
Comparing LP and LR visually, you can see the difference. I hand cycled the primed cases and used them like a cap gun.
My concern was/is that if they are seating high, they might cause a slam fire.
Link Posted: 9/7/2010 7:27:10 PM EDT
If you loaded a mild-mid load, they should be fine to shoot. If you went heavy, pull the bullets.
Link Posted: 9/8/2010 2:15:03 AM EDT
[Last Edit: 9/8/2010 2:15:33 AM EDT by GHPorter]
Originally Posted By fefu23:
If you loaded a mild-mid load, they should be fine to shoot. If you went heavy, pull the bullets.

Wrong. Large rifle primers are taller than large pistol primers. They won't seat below flush and are UNSAFE in pistol rounds like this one.
Link Posted: 9/8/2010 6:29:12 AM EDT
[Last Edit: 9/8/2010 6:30:20 AM EDT by AeroE]
Link Posted: 9/8/2010 6:49:12 AM EDT
Time to get to work with a Kinetic Bullet Puller.
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