Rare Failure Or Not?, it stopped the gun from running

[SHIVAN]

White box Mk262 and an insanely hot July day did me in a few years ago. Was tough to find the primer that had become stuck in the trigger parts.

[Iraqgunz]

Kind of known thing with that ammo. It's insanely hot.

I was getting regular popped primers with independence 55gr. Stopped using that and haven't had a problem since.

[ClearedHot]

Same thing happened when shooting Radway Green SS109 in a Colt 6920. Primer blew out, got stuck in the trigger group and deadlined the gun.

[fifthward]

Same thing happened when shooting Radway Green SS109 in a Colt 6920. Primer blew out, got stuck in the trigger group and deadlined the gun.

Definitely in-experienced on this subject. I have a case of Independence M193 - so I need to ramp up - just in case!

So what did you eventually have to do to get it out? Is it simply a matter of field stripping, and shaking the lower to then hope it rattles out?? Or is it more involved??

[ClearedHot]

Definitely in-experienced on this subject. I have a case of Independence M193 - so I need to ramp up - just in case!

So what did you eventually have to do to get it out? Is it simply a matter of field stripping, and shaking the lower to then hope it rattles out?? Or is it more involved??

It was wedged in there good. Ended up having to disassemble the trigger parts in order to remove the primer.

If something like this happened in an actual situation, you would be stuck with a dead man's rifle.

[MistWolf]

A question for those who've experienced popped primers- what chamber did your rifle have? 5.56? 223 Wylde? SAM-R?

[tarkeg]

A question for those who've experienced popped primers- what chamber did your rifle have? 5.56? 223 Wylde? SAM-R?

The time it happened to me, it was a Rock River upper. The barrel was marked "5.56" and would blow primers with any flavor 5.56 I'd put in it. The primers liked to go under the trigger, making it impossible to fire until you stripped the lower. IMO it had a tight .223 chamber.

Then I learned about Ned's awesome reamer, and it ran fine after I used it.

ETA: This was around 10 years ago. Rifle was sold shortly after I got it running reliably.

[Iraqgunz]

In our case it was the substandard Bushmaster chambers. Once I reamed them with Ned's chamber reamer the issues dropped off significantly.

A question for those who've experienced popped primers- what chamber did your rifle have? 5.56? 223 Wylde? SAM-R?

[Clint]

I'll add that severe over gassing will increase the frequency of blown primers significantly.

I believe it's one of those issues with 3 contributing factors - hot ammo, tight chamber and over gassing.

*

It happened in Iraq several times with our BMs and 5.56 ammo. I have heard of about this happening about a dozen times since. When it happens its either crappy ammo or tight chamber.

Kind of known thing with that ammo. It's insanely hot.

I had a 16" 223 Wylde middy barrel with an .093" gas port.

Can't remember, but probably had an H2 buffer in it at the time.

It would not run steel case ammo at all, kept ripping the rims off and not extracting.

Brass 223 like PRVI ran ok

XM193 would blow primers left and right.

Got some jammed up under the trigger too.

Sounds like a real POS barrel, eh?

After dropping the gas port down to .073/.076", that same barrel will run everything.

IMI M193, CBC 62 gr ball, Prvi 75,wolf 55, MFS 55, you name it.

A question for those who've experienced popped primers- what chamber did your rifle have? 5.56? 223 Wylde? SAM-R?

Blown primers are not Normal and not OK.

One or more of those 3 factors may be present and should be corrected before continuing.

Shooting yesterday, and had a few primers (un Crimped) come out and float around in lower. Cleaned one primer from under trigger group. Took rifle to school today and bang. Single shot only....

Found primer material clogged inside gas key. About .6" inside. Can get it out. Is this a known matter or is this a freak deal. Seems like the stars had to align just right to get that aligned and timed perfect.

Thanks

[user]

Daniel Defense Mid upper. The amazing thing was that this debris actually got in such a small hole in the key. Even after removing the key, and pounding I couldn't get that primer (cup)? out.