View Full Version : Officer Safety: Ammunition cycling and failure to fire

02-17-2012, 9:46 PM
This was sent to me by a friend in an email. I've copied and pasted as it was sent to me. I thought I would share it with you guys. I know it was for LEO but I think it would help any fellow CCW's or anyone that unloads their firearm on a regular basis.

This is a superb example of why you train for worst-case events. Train for the catastrophic failure. Go home at the end of your watch.


In September of this year a PD officer was involved in a situation which quickly became a use of deadly force incident. When the officer made the decision to use deadly force, the chambered round in his duty pistol did not fire. Fortunately, the officer used good tactics, remembered his training and cleared the malfunction, successfully ending the encounter.

The misfired round, which had a full firing pin strike, was collected and was later sent to the manufacturer for analysis. Their analysis showed the following: “.the cause of the misfire was determined to be from the primer mix being knocked out of the primer when the round was cycled through the firearm multiple times”. We also sent an additional
2,000 rounds of the Winchester 9mm duty ammunition to the manufacturer. All 2,000 rounds were successfully fired.

In discussions with the officer, we discovered that since he has small children at home, he unloads his duty weapon daily. His routine is to eject the chambered round to store the weapon. Prior to returning to duty he chambers the top round in his primary magazine, then takes the previously ejected round and puts in back in the magazine. Those two rounds were repeatedly cycled and had been since duty ammunition was issued in February or March of 2011, resulting in as many as 100 chambering and extracting cycles. This caused an internal failure of the primer, not discernible by external inspection.

This advisory is to inform all sworn personnel that repeated cycling of duty rounds is to be avoided. As a reminder, when loading the weapon, load from the magazine and do not drop the round directly into the chamber. If an officer’s only method of safe home storage is to unload the weapon, the Firearms Training Unit suggests that you unload an entire magazine and rotate those rounds. In addition, you should also rotate through all 3 duty magazines, so that all 52 duty rounds are cycled, not just a few rounds. A more practical method of home storage is probably to use a trigger lock or a locked storage box.


The primer compound separation is a risk of repeatedly chambering the same round. The more common issue is bullet setback, which increases the chamber pressures often resulting in more negative effects.


In addition to following the guidance provided above of constantly rotating duty ammunition that is removed during the unloading/reloading of the weapon, training ammunition utilized during firearm sustainment and weapon manipulation drills, should also be discarded if it has been inserted into the chamber more than twice.
This practice lessens the likelihood of a failure to fire or more catastrophic results.

Bobby Ricigliano
02-18-2012, 5:14 AM
This has been addressed here before but it's good info regardless. The best solution IMO is to have a 'dump cup'. Once that round has been cycled a few times just retire it to the cup and expend it at the next range session. Keep your carry loads factory fresh.

02-18-2012, 8:13 AM
So about 50 cycles = dead primer. Good info. I will mark my top round. After 10 times place that in a box labled "TRAINING ROUNDS ONLY" Since I rarely unload that magazine I think this wouldnt be a problem. I only unload to do my maintainance schedule every 6 months on unfired magazines.