It is then sent for melting and recycling. It is never designed with the intention of reloading. Aug 16, 0 2 37 Niceville, FL. It's also cheaper than using primer sealant. Bacarrat Gunny Sergeant Full Member. Jan 22, 2, Houston, TX. Have you ever picked up XM right after its fired? Flat primers and ejector swipe on just about all the cases out of my M4. I could only imagine what would happen if they werent crimped from the LC plant.
Cowboy Private Minuteman. Aug 20, 31 0. If the AR situation is that bad, are civilians doing something different when they reload for it? Grump Gunny Sergeant Full Member. Oct 23, 1, 10 61 So. Jul 10, 3, 5 44 Back in BHam!!! Rovieairto Sergeant Full Member. Oct 4, 0 47 Minneapolis MN. Also ammunition that is used at elevated temps tends to have elevated pressures that could blow primers.
Swaged with RCBS. Swaged with Dillon. Share this: Twitter Facebook. Like this: Like Loading Keith Says:. Darrin Zimmerman Says:. Neal Says:. Bart Says:. Rich Senecal Says:. Mike Says:. Jay Says:. Michael McNamara Says:. Seth O. Don Harmon Says:. Ron Says:.
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The porimers tended to back out and also the primer Pockets would leak. The Germans whilst they had adopted the Maxim in and , only made their own in The Italians, in solving their Case failure problems, hardened the head by extra cold working the circular groove. Admittedly, the crimping of balle D for the Hotchlkiss M Gun was a necessary matter; but the french also developed the "protected primer double cup thickness, effectively a small primer about.
The British began ringing their. The European nations continued making ammo with three stab crimps, following German practice, although a lot of countries used no crimp at all, just a tight interference fit of primer cup with primer Pocket usually the pocket is about. Overall, it can be said that by , all MG use ammo was crimped in one way or another; Rifle ammo followed suit by default, as it was easier to crimp all ammo during manufacture, than to risk mixing of different types of ammo.
Going back to the Ingolstadt Patrone 88nA, the reasoning behind the crimp probably had more to do with case head metallurgy than with MGs or headspace problems. Primers will back out of a too-soft cases even in a tight gun; The Use of smokeless Powder was a whole new ball game, in comparison with the earlier Balloonhead Cases used with Black Powder, and the metallurgy was not yet catching up. Lots of interesting information there. My question is where,when and why the primer crimps were first used.
You might note that there are no specimens of 11mm Mauser cartridges known with primer crimps even though,as you say, Germany had Maxim guns in that caliber. Also, many 7x57mm Mauser chambered MGs were made and used ammunition with primer crimps in that caliber are not common.
The earliest primer crimp on a specimen shown so far here is I understand that here are earlier ones from Austria but have not seen those yet. The addition of the stake crimp to the WW1 era US ammo over the ring crimp was weapon specific see Hackley,Woodin,Scranton vol 1- p No doubt that the primer crimp was and is a usefull invention BUT who invented it?
So far the earliest identifiable primer crimp is on 8x50R Austrian ammo dated These have the ring crimp. Berdan was a us soldier, in invented the double gas port berdan primer. Primers were crimped to prevent Them from backing out of the Case due to the vibration from firing the Weapon. A buddy of mine and his brother shot in the matches down at Camp Perry using AR15's.
They would both coat the inside of the lower receiver with grease to catch any blown out primers to prevent them from getting under the trigger and jamming it up ruining their match. They both shot at long ranges using hand loaded ammo with heavy bullets and it wasn't that uncommon for primers to pop out.
I have never shot any hot rodded 5. Yep, the military ammo has a crimp to make sure the primers stay in place under all conditions. The military is often redundant about making sure their equipment keeps working. I have been shooting for 45 years and reloading for over 30 and have only had one occasion where primers backed out of the cases. If those primers backed out in combat and rendered my weapon worthless then that one instance would be enough for the military to require crimped primers.
Same with primer and bullet sealant, I've fished some of my reloads out of a creek and they all fired, but if it only failed one in 1. Moe Mentum.
I have found 5. Yes , primers will get pushed out at times. Originally Posted by BigBill. Because, on occasion, we tend to use anything we have as impromptu SAW. That's tough on the guns, and as the barrel heats up headspace can get a little dicey shall we say.
And sometimes the primers pop loose. Mike, SC Hunter. Originally Posted by rwsmith. Primers are crimped in order to keep them from backing out when used in full auto weapons. It has nothing to do with weatherproofing or any type of "redundancy" theory. The primer does not have to pop out of a fired case and fall into the action to tie up a weapon. The MilSpec requiring this just simplifies things for the armed services.
There is then no special ammo for automatic weapons. Those who buy surplus military rifle brass, especially 5. This is because the SAW chambers are so generous in size that it makes resizing the fired brass problematical. Last edited by BruceM; at AM. Terms of Service. All times are GMT The time now is AM.
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