WCC brass... tore 2 case heads off in class today

16"
h2 buffer
RRA Chromed Bolt
cleaned a week ago

today ran 300 rounds, mix, LC, UMC, wolf, TZZ, XM193, WCC…

2 times, the extractor tore the side of the head of WCC’s… and easy tap with a cleaning rod removed, not stuck, brass looked ok ,
before this class i have shots 500+ wolf’ 200 umc’ shit loads of reloads and others, never have i had this issue, any ideas?

and the instructor was using XM193 he had had 5 or so blown/popped primers… then he got pissed tossed all of it and switched to silver bear and ran 100% :slight_smile:

What rifle? Sounds like a ‘shooting 5.56 in a tight .223 chamber’ problem.

Reloads? Likely SAW brass.

Was that XM193 in YOUR rifle?

XM193 still blowing primers? Heard this happening sometime back

How well do you clean your chamber?

I would clean my rifle no matter how many rounds I have fired wolf, bear, ect. I understand people want to see how long the ar with di system can perform but taking care of your weapon like cleaning is so easy. Hell I enjoy cleaning my guns:lol:

Sorry for the thread jack but majority of the members on this forum will never need to fire hundreds of rounds and not be able to have the time to clean it. Unless the US as we know it collapse or whatever.

Having fun in the carbine class?

its not a match chamber, it is 223, and i shoot 556 all the time, the most i see is flat primers

no, new old mil surp from late 90’s i think

i shot his xm193 in my gun when he tossed it out :)… but it shot fine in my gun.

GI chamber brush in a cordless drill…

There you go. You do know .223 and 5.56 are not universally interchangeable, yes? You can shoot .223 in a 5.56 chamber, but not 5.56 in a .223 chamber (reliably). There are minute differences that make 5.56 just a wee bit tight in a .223 chamber.

GI chamber brush in a cordless drill…

The chamber should be scrupulously cleaned after shooting steel-cased ammo, before shooting brass-cased ammo.

Do searches on these subjects. There is quite a bit written here on M4C about both issues.

no, new old mil surp from late 90’s i think

Tearing rims or ripping the case head off?

If it is the former, there were some bad lots of Win M-193 type ammo put out in the late 90’s in their white box line.

Q3131 IIRC.

GI chamber brush in a cordless drill…

Waaay overkill and destroys the brush.

Manually spin it on a rod with the handle about 7-10 turns and soak the chamber overnight in Hoppes or Shooters Choice. The carbon and gunk will be throughly broken-down by then and clean out easily.

223 is not “tighter” then 556… the throat lead in is cut longer on 556, this only has a effect on chamber PSI

i know on the steel issues, but like i said… iver shot crap loads of mixed ammo, “556/223/wolf” over the years, this WCC was the only stuff that this happened with

Tearing rims

No there are not. There are no dimensional differences at all between 5.56 and .223 brass.

For most intents and purposes, the two rounds are interchangeable. But sometimes not, as in this case. A 5.56 chamber has a longer throat than a .223 chamber, so 5.56 ammo ideally shouldn’t be used in a .223 chamber. I’ve been reloading a long, long time and this has been common knowledge for quite a while.

Honestly, it’s no skin off my back what ammo the OP uses, I was just answering his question to try to solve his problem. A .223 chamber reamed to the small side of the specs may be a bit too tight to reliably function using some mysterious lot of military surplus 5.56 NATO that was sized a bit on the large side of the spec.

If you want your .223 AR to function correctly with 5.56, then have the chamber reamed to 5.56 and be done with it.

That is the chamber dimensions. I never said the chambers were the same. I said the brass is dimensionally the exact same.

Which begs the question (to which I’m sure you have an answer), why is ammo marked differently on the container, .223 or 5.56mm?

Thanks

Which begs the question (to which I’m sure you have an answer), why is ammo marked differently on the container, .223 or 5.56mm?

Thanks

Because they are loaded to different specs.

A .223 chamber is different than a 5.56 chamber to handle the differently specced loadings.

Chadbag
As usual your wrong! The cases are different 5.56 mm case length is 1.760" where .223 Rem cases are 1.750" . The 5.56mm case stuffed into a shorter .223 Rem chamber is not good thing as SAAMI and all the rifle manufactures state unless you feel stuffing .010" of brass into the lead of a rifle is a good thing! This is why the OP is seeing FLAT primers-IE over pressure . It’s his face if he wants to continue this practice ! But I would suggest he doesn’t for the safety of others around him!:rolleyes:

P.S this is a well documented fact as a reloader I seen this first hand. Please tell me why when I size and reload both .223 rem and 5.56mm brass do I always find the .223 Rem brass alway comes out to be shorter 1.740-1.755" where as 5.56mm brass is always 1.760"- 1.770"? Cause they are different.