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Posted: 7/14/2008 9:49:51 AM EDT
[#1]
I could very well be wrong but from what I have read blown primers usually come from firing the hotter 556 loads in a 223 chamber. Could this have been the problem or are you sure it was the ammo. Makes me nervous cause I just ordered some.
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Posted: 7/14/2008 10:17:18 AM EDT
[#2]
Na, its a 5.56 chamber. First time ive ever had this occur.
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Posted: 7/14/2008 10:22:10 AM EDT
[#3]
OK, this is a dumb question, but what exactly is a 'blown' primer?
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Posted: 7/14/2008 11:30:40 AM EDT
[#4]
The primer blows out of the casing.
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Posted: 7/14/2008 4:50:43 PM EDT
[#5]
And a lot of the time falls down into your trigger system, gets stuck and causes a large volume of cursing until you can get it out.
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Posted: 7/14/2008 8:43:34 PM EDT
[#6]
Lot # ?????
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Posted: 7/15/2008 9:24:09 AM EDT
[#7]
Is this common with xm193?
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Posted: 7/15/2008 7:26:14 PM EDT
[#8]
I've been told that the black box is the same as the older brown box stuff. But the brown box stuff didn't seem to have this blown primer problem. I've fired probably 500 brown box and 500 black box, and i've had 3 blown on the black box, but none on the brown box. Could be a coincidence though.
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Posted: 7/16/2008 8:34:05 AM EDT
[#9]
I'm also wondering about this also. I just bought 1K rounds of this ammo as described by the OP  .
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Posted: 7/16/2008 11:54:51 AM EDT
[#10]
OP did you save any brass or can you at least remember if the headstamp was 07 or 08?
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Posted: 7/16/2008 12:54:39 PM EDT
[#11]
Bought some at scheels for 9.99 a box, had 2 blown primers 08 stamp LOT NO L 67 K901, i'm gonna be keeping the brown box stuff, aint trusting the newer stuff any time soon
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Posted: 7/16/2008 4:24:08 PM EDT
[#12]
Retailers are swearing up and down that brown box & black box are identical but I've seen at least 3 or 4 reports of blown out primers in the recent "batch" of black box ( although this is the first time I've seen an actual Lot# cited) with no corresponding reports of the same from the brown box. Maybe just a coincidence but it seems odd.
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Posted: 7/17/2008 2:18:45 PM EDT
[#13]
ok guys, found the boxes. Mine were from lot number 49 W418.
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Posted: 7/17/2008 4:32:31 PM EDT
[#14]
I fired 120 rounds of LOT NO V 49W435 on Sunday and 200 rounds of LOT NO P47W546 today with no blown primers or failures
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Posted: 7/17/2008 6:11:50 PM EDT
[#15]
Was there a letter in front of the 49? Do you know what year the ammo was headstamped? 
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Posted: 7/17/2008 6:37:26 PM EDT
[#16]
That's the lot number of most of the black box I've shot already. No problems so far. |
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Posted: 7/18/2008 1:08:26 AM EDT
[#17]
No letter in front. Box says 2007. Dont have any of the fired casings left. |
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Posted: 7/18/2008 5:03:31 PM EDT
[#18]
No; not at all. Lake City XM193 is some of the best ammunition you can buy. I have not used the American Eagle Tactical rounds. I heard there isn't a difference, but I don't know for sure. Play it safe and use the Lake City. www.ar15.com/content/page.html?id=210 |
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Posted: 7/18/2008 8:36:30 PM EDT
[#19]
I decided to bust open one of the cases I received today after reading these reports of blown primers. Headstamp says "LC08", boxes are marked "Lot No P49W563".
Bad news: The rounds aren't the prettiest I've ever seen. Some of the cases are dinged up pretty good, and there's some sort of black stain (sealant?) on some of them. The last time I bought m855pd it looked nicer than this stuff. Good news: They may not be pretty, but they certainly work. I only put about 200 downrange, and I didn't have any issues at all. No blown primers. It ran really nicely in my beat up old Oly that I haven't cleaned in far too long. No complaints, other than the current cost of course. |
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Posted: 7/19/2008 9:10:29 AM EDT
[#20]
Ditto here. Lot # 49W435. Have 1400 rounds and it's all ugly as hell (looks alot like PD) but runs fine. |
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Posted: 7/19/2008 2:41:51 PM EDT
[#21]
Some of the lot #s mentioned in this black box thread seem to start with a letter and some don't. Whats up with that?
I have some 49 W418 with headstamped of '07. Can't seem to find a letter before the 49 anywhere on the case or boxes inside. I haven't shot any yet, but will post when I do. |
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Posted: 7/20/2008 1:42:55 AM EDT
[#22]
I opened one of the 20 round boxes when I received my shipment this week and also noticed how horrible the rounds looked
 . Well just as they perform better than they look I'm okay with that.
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Posted: 7/20/2008 1:50:49 AM EDT
[#23]
Stop the Presses XM193 not looking pretty.
That is how they look and always have been. Dang I had M855 with Dings in Iraq that worked on Haji. As long as its not huge it will be fine. Brown Box looked the same way in some of the boxes. At least ya'll are shooting them I need to add. If you do not like it send it to me I will give you 6.00 a box shipped. |
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Posted: 7/20/2008 4:05:05 AM EDT
[#24]
If the black box is the same, shouldn't it have crimped primers to prevent blow out?
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Posted: 7/20/2008 5:31:23 AM EDT
[#25]
From what I understand, the crimped primers are to prevent primers coming out during transit. Crimping will not prevent primers from popping out due to high pressure. I know this first hand.
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Posted: 7/20/2008 4:43:13 PM EDT
[#26]
I guess I'm a bit spoiled after shooting a bunch of S & B, Remington, and Winchester ammo that were all pristine. I did get a good price on the black box XM193 (but shipping was expensive
 to Hawaii). Well I've got them so I'll shoot them when I get to them. I'm just being a bit paranoid after hearing about blown primers and its relation to this particular ammo. I'll get over it after shooting this particular ammo.
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Posted: 8/4/2008 4:04:53 PM EDT
[#27]
I shot 240 rounds of the black box xm193 yesterday. 120 rounds out of lot V 49 W534 and 120 rounds out of lot V 49 W513 W513 produced two action stopping blown primers, and W534 produced one action stopping blown primer. I collected most of my spent cases and only found the 3 bad ones. I'm pretty bummed out about it, I still have ~400 rounds of each lot left. By the way the head stamps are LC 08. I thought I would share my experience with everyone.
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Posted: 8/4/2008 4:48:30 PM EDT
[#28]
Anybody blowing primers need to read this tacked thread in the Troubleshooting section!
HINT: It's not the ammo. www.ar15.com/forums/topic.html?b=3&f=66&t=235071 Moral of the story: XM193 is hot stuff and if you have chamber issues (short leade or throat) it will kindly point them out to you |
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Posted: 8/4/2008 5:51:56 PM EDT
[#29]
I suppose that is a possibility. I shoot out of a Wylde chamber, I wonder if the diffference in chambers between 5.56 and Wylde cause this kind of issue?
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Posted: 8/4/2008 5:58:44 PM EDT
[#30]
It is the ammo. Ive shot plenty of M193 and Q3131 from this rifle before with 0 stoppages.
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Posted: 8/4/2008 7:00:33 PM EDT
[#31]
Have you tried the suspect lot of ammo in another rifle or rifles to confirm this? |
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Posted: 8/4/2008 10:30:41 PM EDT
[#32]
nope. Only had 60 rounds of the black box. Switched back to some older brown box and all was fine.
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Posted: 8/5/2008 11:45:41 AM EDT
[#33]
I just shot 180 rounds of lot# U49 W557 with 08 HS and had zero failures, no pooped primers. I was a little disappointed, I expected the worst.
Both of the barrels I used today have 5.56 chambers; a 16" Sabre middy, and a 16" Wilson Arms carbine. I'll keep shooting it and see what happens. |
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Posted: 8/5/2008 1:24:02 PM EDT
[#34]
have any of the reloading guys broken any of these down and weighed the powder charge? It would be a good way of getting to the point.
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Posted: 8/5/2008 3:46:25 PM EDT
[#35]
Ive fired almost 3 500 rd cases of this stuff in the past few months and no problems.Mine is from 2007 lot no. 49 W402 on one case,not sure about the other 2 cases. Maybe they are having QC issues and some bad batches got loose.At the price its going for locally i would have a fit if I got a bad batch.
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