best ar 10 large rifle primers?


LINK to interesting article on primers which contains a chart on cup thickness of various primers.

CCI Large Rifle 7.62mm NATO-Spec Military Primers #34
Quote:CCI 7.62mm NATO-Spec Military Primers are a military large rifle primer containing magnum priming mix. The CCI #34 primers are a great choice for reloaders that use military cartridges. These primers are specially made to be harder to ignite which prevents slam fires in military type rifles with a floating firing pin. All CCI primers are continuously tested and improved. As a result today's CCI primers are more sensitive, easier to seat and more compatible with progressive and automated loading equipment than ever before. They utilize modern non-corrosive and non-mercuric initiator mixes for the cleanest burn possible.

Regards,
hm
 
I've had great luck with Federal Gold Medal Match, CCI #34s as well as CCI BR2s.

All three have thicker shot cups and I've never heard of a slam fire in any if these.
 
CCI Bench Rest primers have done the job for us over many 1000s of rounds, both large & small sizes (BR2,BR4).

Although I'm certain there have been some slam fires in AR style rifles, I have yet to actually hear someone say "Yes, I had a slam fire". All I hear are heresay or rumors.

But I suppose it is better to be safe than sorry anytime we are loading or shooting our firearms.
 
Originally Posted By: HidalgoCCI Bench Rest primers have done the job for us over many 1000s of rounds, both large & small sizes (BR2,BR4).

Although I'm certain there have been some slam fires in AR style rifles, I have yet to actually hear someone say "Yes, I had a slam fire". All I hear are heresay or rumors.

But I suppose it is better to be safe than sorry anytime we are loading or shooting our firearms.


I've actually witnessed 2, one was during the Predator Masters LBL hunt about 06'. Three of us was hunting together and the PM member was using Remington 6 1/2 primers in his AR. He chambered a round at our second stand that morning and it went off. My buddy and me was right beside him looking at him when he let the charging handle go, he definitely didn't pull the trigger either.

The other was at a clearing barrel in Afghanistan on an issued M4 and issued ammo that I'm 99% sure was due to sand/grit between the bolt face/round from a weapon that was to oily for desert operations and using the same round over and over that had been repeatedly chambered. Our SOP was for an NCO to stand beside every leaving/returning soldier of your element and witness proper clearing and loading in a clearing barrel to ensure safety and the safety was definitely on nor did the soldier pull the trigger.

Another thing that can cause an issue is primers that aren't seated properly i.e. deep enough.

Both of these first hand ADs is enough to solidify to me the importance of chambering a round in a safe direction.
 
Originally Posted By: Kino MBoth of these first hand ADs is enough to solidify to me the importance of chambering a round in a safe direction.

Sage advice for any platform.....
 
You will likely begin to hear the internet myth that CCI #34's are a magnum primer.

They are not. 200's and 34's have identical velocities over my lab radar.

If you want a hot primer, get WLR's
 
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