351 WINCHESTER
Member
I just found out that cci makes a 5.56 ar specific primer, their #34 to eliminate slam fires. I loaded some with standard small rifle primers and I'm wondering now if they will be ok for my AR.
Unless, ...unless that is, you are shooting a Garand and/or an M1A. There, I never recommend anything less than CCI (never Federal), and always watch for other shooters letting a bolt fly full-stroke/freely home on a loose cartridge.Unless your shooting comp, don't worry about the fancy primers.
So far, none have blown up.
There is no truth to the "slam fire" issue.
There is no evidence to suggest that.The primer cup is constructed of thicker metal so the primer won't "blow out" and deposit debris in the trigger action of an AR series rifle,
Your experience may be the result of a high primer (or "other factors" (as described by CCI, below) that you have not identified).So what do you call my experience if not a slam fire?
Here is what CCI says about it:
"Military-style semi-auto rifles seldom have firing pin retraction springs. If care is not used in assembling ammunition, a “slam-fire” can occur before the bolt locks. The military arsenals accomplish this using different techniques and components—including different primer sensitivity specifications—from their commercial counterparts. CCI makes rifle primers for commercial sale that matches military sensitivity specs that reduce the chance of a slam-fire when other factors go out of control*. [emphasis added] If you’re reloading for a military semi-auto, look to CCI Military primers. *Effective slam-fire prevention requires more than special primers. Headspace, chamber condition, firing pin shape and protrusion, bolt velocity, cartridge case condition, and other factors can affect slam-fire potential."
All rifle primer cups are able to contain far more pressure then any common rifle cartridge can safely produce.
I hope that's a typo because the CCI #34 primers are LR primers and won't fit in your .223/5.56mm ammo. As written above, you will need the CCI #41 primers which are made for small rifle primer cases. I use the #34 primers for making my 30-06 M1 Garand ammo and find them no harder to seat than other primers.I just found out that cci makes a 5.56 ar specific primer, their #34 to eliminate slam fires. I loaded some with standard small rifle primers and I'm wondering now if they will be ok for my AR.
Thats not what I have seen.which is why blown primers are commonly encountered when firing 5.56mm ammo in AR's chambered for ".223 Remington", and the debris becomes lodged in the trigger mechanism
CCI® No. 34 and No. 41 MILITARY RIFLE PRIMERS
Military-style semi-auto rifles seldom have firing pin retraction springs. If care is not used in assembling ammunition, a “slam-fire” can occur before the bolt locks. The military arsenals accomplish this using different techniques and components—including different primer sensitivity specifications—from their commercial counterparts. CCI makes rifle primers for commercial sale that matches military sensitivity specs that reduce the chance of a slam-fire when other factors go out of control*. If you’re reloading for a military semi-auto, look to CCI Military primers.
*Effective slam-fire prevention requires more than special primers. Headspace, chamber condition, firing pin shape and protrusion, bolt velocity, cartridge case condition, and other factors can affect slam-fire potential.
There was at one time a warning against using the 6.5 SR in the 223 on Remingtons web site and IIRC on the box.
"Military-style semi-auto rifles seldom have firing pin retraction springs. If care is not used in assembling ammunition, a “slam-fire” can occur before the bolt locks. The military arsenals accomplish this using different techniques and components—including different primer sensitivity specifications—from their commercial counterparts. CCI makes rifle primers for commercial sale that matches military sensitivity specs that reduce the chance of a slam-fire when other factors go out of control*. [emphasis added] If you’re reloading for a military semi-auto, look to CCI Military primers. *Effective slam-fire prevention requires more than special primers. Headspace, chamber condition, firing pin shape and protrusion, bolt velocity, cartridge case condition, and other factors can affect slam-fire potential."