URGENT - Safety issue - CCI Standard Velocity 22 LR Ammo

Chas

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Last week at handgun league, I was marking targets when there was a loud detonation on the firing line. The RO called a cease fire and asked if the shooter was ok.

The shooter had pulled the trigger and along with the loud report, the magazine had blown out of the pistol, with powder marks on the shooters hand. When we cleared the pistol, there was a headless case stuck in the chamber, we never found the case head. The detonation actually severly dented the cases of 2 unfired cartridges in the magazine.

We wrote it off as one of those things that happen but we have had a second incident this weekend. Both shooters were using CCI Standard Velocity 22LR ammo in blue 50 round boxes. A group of us bought a batch order a couple of years ago.

One of our shooters was using his Ruger 10/22 at the range and he had a detonation that blew the magazine out of the rifle and left powder marks all over his hand. The force of the detonation blew a chunk out of the side of the rotary magazine. The case head did not separate but was cracked open around most of the base of the rim. The lot number of this ammo is H21CA10. He had fired about 100 rounds when this occurred.

Attached are pictures of the 10/22 incident and I haven't received the pictures from the handgun incident yet or the lot number of that ammo.

Trying to find out who the Canadian distributor is for CCI ammo so we can flag the issue with them, as well as CCi.

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Edit- pictures from the handgun incident, waiting for a lot number

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This stuff is pretty much the standard go-to for our bullseye group. I appreciate your group sharing this with the rest of us; I will be checking the lot numbers of my own and sharing this with my club. When you find out the serial number of the ammo for the pistol, please share also.
 
10/22 likely out of battery detonation.

Just did a test with my 1022.. I used feeler gauges to space out the bolt. I could get the hammer to drop past 0.115" of gap. But .022" to .0224" I had ignition.

Every firing pin can be different and I was getting light strikes up to .045 of gap. So out of battery can happen with a 1022.
 
It looks like the cases were “fired out of battery”. This explains the mag issue, also. If the case wasn’t fully seated (and action locked) when the cartridge is fired. The cartridge case head fails because it isn’t fully supported by the chamber and action face. When this happens, it allows combustion gases to blow back…sometimes violently out the mag well.

I‘ve seem this more than a few times with .17HM2 17HMR cartridges. All were fired in semi-auto Ruger 10/22 clone rifles.. All happened during a rapid fire “mag dump”. A dirty rifle may have contributed to the issue. Certainly in my experiences the energy profile of the ammo contributed to the action cycle timing.

Interesting that it happened with standard velocity 22LR ammo. Is it possible that the low energy ammo affected action timing and it fired out of battery?
 
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