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Posted: 10/12/2003 6:07:28 PM EDT
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The accompanying pic is a round of Wolf that I chambered and ejected from a clean weapon. I know that a slam fire is possible, but I wonder how probable it is. Anybody out there ever had a slam fire? What were the circumstances?  Thanks. Hoppy |
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That little ding isn't worth worrying about. The AR has a free floating firing pin and it is impossible to chamber a round without marking the primer. That is why military ammo has harder primers. Just make sure the firing pin doesn't either stick out too far or get jammed in the hole. If either one of those happens you will get a nasty surprise. Cheers! |
| yea that is messed up huh? from a design point of veiw i dont think i would have been daring enough to leave that up to chance. ive never read here about the pin firing the cartridge and im up to 2700 rounds without it happening. but its gotta happen to someone somewhere? right? |
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Quoted: Quoted: I've reloaded with CCI and winchester primers. I don't know how "soft" they are, but I've never experienced a slam fire. Primers (hardest to softest): CCI Winchester Remington Federal -Troy Thanks Troy! That's good to know I was unknowingly using the hardest primers. [banana] Torf...always good councel(that's where the muzzle should be pointed always)! |
| I had a slam fire in my mas 49\56. Was chambering rounds at the range checking for a problem from one mag. Was using the same ten rounds in each mag. I did notice the little kiss on the primer but thought nothing of it, When all of a sudden the last three rounds burst. I think from chambering these rounds a few times it dimpled the primer a little at a time. After the shock of the sudden burst sat back and wished it was legal to play like that all the time. It was cool. |
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The M16 firing pin was redesigned in 1963 ([i]nineteen sixty three[/i]) -- 40 years ago -- and the "slamfire" effect was rare before the fix. The change was accomplished [i]before[/i] the Army made it's first contract purchase of the XM16E1. Primer sensitivity was also addressed at the same time. Note in a slam fire the hammer doesn't fall and I've never seen a documented case of this happening using standard rifles and military ball ammo. It just doesn't happen. Literally every military self loading rifle ever made has a free floating firing pin, starting in the US with the M1 Rifle. Therefore every military self loading rifle will dimple the primer when it loads. There is a primer sensitivity spec for military ball ammo. Reloaders beware. -- Chuck |
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Quoted: Troy, or any one with the answer, What about the hard Mil-Spec primers sold by CCI (?) I think. Do they have the same brisance as standard CCI 400's? Big Al CCIs "Mil-Spec" small rifle primer is the no. 41 primer. "Brisance" is the shattering effect of an explosive so I'm not sure what you are asking. CCI states that the 41 primer is a magnum primer with the same performance as the CCI 450 Mag primer, which is what I think you wanted to know. MM |
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CCI offers two military primers (that are relevant to this discussion), the #34 for Large Rifle, and the #41 for Small Rifle. They are "military" because they have reduced sensitivity. Both are classed as "magnum" primers, because most military ammo is loaded with ball powder that's often a bit harder to get lit than stick powder. The #34 is less sensitive because the primer cup is thicker. The #41 is less sensitive because the anvil is further away from the face of the primer, requiring a deeper hit on the primer. It was found that making the primer cup thicker would result in failures to fire in some (usually non-military) guns, but moving the anvil back allowed all guns to function normally. -Troy |
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