Look at this brass, tell me what caused this

BigSlick · January 1, 2006, 05:07 PM

Hi guys,

I just loaded a few rounds of 500SW.

When going thru loaded round inspection, I noticed one piece of Corbon brass had an odd anomoly.

I pulled the round, and the same is on the inside of the brass, with interior and exterior edges raised enough to catch a finger nail or dental pick on.

I haven't fired the brass in my 500, I just bought this batch of 100 from brassman.

I don't know what would cause something like the ring, but it looks like it was a 'filler' piece of some sort.

I'm not going to fire this for sure. I went thru the rest of the brass with a magnifying glass under a bright light and none of the others exhibit the same marking.

What causes this ?

Just a reminder to be thorough in your round inspection, I can't imagine what a KB would be like with 42gr of H4227

Opinions ?

Thanks

BigSlick

JJB2 · January 1, 2006, 05:31 PM

hhhhuuummmmmm......... very interesting!!!

LIFE IS SHORT.................

Kamicosmos · January 1, 2006, 06:42 PM

some kind of manufacturing defect I assume. Case got pinched by something in the machinery at the factory. If that was the only one, I'd just pull the round to salvage bullet and power, and cruch that case with a pair of pliers. If there are several in your batch, I'll let the reseller know in case there's a recall on that brass.

JDG · January 1, 2006, 06:48 PM

Looks like a test cartridge for measuring pressure. My speer reloading manual shows a drawing on the copper crusher method to find (c.u.p.) pressure ratings

JDG

saands · January 1, 2006, 09:26 PM

I think that JDG nailed this one ... I was trying to figure out why a cylinder would have a perfectly round defect in it. As this is once fired, whatever external artifacts that may have been there from the factory would be trounced by artifacts in the cylinder. I would still let brassman know that he is sourcing some dubious brass.

Saands

kcoop9999 · January 8, 2006, 02:19 AM

JDG took my guess. This looks like it's been through a pressure barrel.

impact · January 8, 2006, 05:27 PM

I would keep the case in my collection of odd things. Thats unique! I never saw a case like that before.

Harley Quinn · January 8, 2006, 06:40 PM

I would send some pictures to the brassman and say, hey what the heck...

You are probably very lucky, no you are very lucky.

Reminds me of a time a guy was shooting and I said to him, that one did not sound right better check your barrel. He did and the bullet was stuck in the barrel.
I have seen a few bulged barrels and blown revolvers because of bad loading techs.

But that right there was a major error in the inspection at Brassman or where they get the brass. They should be very happy with you for telling them.

Be nice, you might make a friend.

Harley

January 1, 2006, 05:07 PM	#1
BigSlick Senior Member Join Date: January 25, 2005 Location: Texas of course Posts: 277	Look at this brass, tell me what caused this Hi guys, I just loaded a few rounds of 500SW. When going thru loaded round inspection, I noticed one piece of Corbon brass had an odd anomoly. I pulled the round, and the same is on the inside of the brass, with interior and exterior edges raised enough to catch a finger nail or dental pick on. I haven't fired the brass in my 500, I just bought this batch of 100 from brassman. I don't know what would cause something like the ring, but it looks like it was a 'filler' piece of some sort. I'm not going to fire this for sure. I went thru the rest of the brass with a magnifying glass under a bright light and none of the others exhibit the same marking. What causes this ? Just a reminder to be thorough in your round inspection, I can't imagine what a KB would be like with 42gr of H4227 Opinions ? Thanks BigSlick __________________ Nobody likes war, but if you find yourself in one - fight for those you serve with and to make the trip home. Show mercy to those that deserve it and a relentless, ruthless, cunning evil to those who don't.

January 1, 2006, 06:42 PM	#3
Kamicosmos Senior Member Join Date: January 31, 2002 Location: Kansas City, Missouri Posts: 193	some kind of manufacturing defect I assume. Case got pinched by something in the machinery at the factory. If that was the only one, I'd just pull the round to salvage bullet and power, and cruch that case with a pair of pliers. If there are several in your batch, I'll let the reseller know in case there's a recall on that brass. __________________ "Dreams only have meaning because we struggle in the waking world." -- Major Motoko Kusanagi GitS:SAC Member of NRA and Western Missouri Shooters Alliance

January 8, 2006, 06:40 PM	#8
Harley Quinn Junior member Join Date: August 30, 2005 Location: State of KALI Posts: 1,531	I believe it is the c.u.p. test also... I would send some pictures to the brassman and say, hey what the heck... You are probably very lucky, no you are very lucky. Reminds me of a time a guy was shooting and I said to him, that one did not sound right better check your barrel. He did and the bullet was stuck in the barrel. I have seen a few bulged barrels and blown revolvers because of bad loading techs. But that right there was a major error in the inspection at Brassman or where they get the brass. They should be very happy with you for telling them. Be nice, you might make a friend. Harley

January 1, 2006, 05:31 PM	#2
JJB2 Junior member Join Date: December 14, 2005 Posts: 558	hhhhuuummmmmm......... very interesting!!! LIFE IS SHORT.................

January 1, 2006, 06:48 PM	#4
JDG Senior Member Join Date: November 28, 2005 Location: West Michigan Posts: 673	Looks like a test cartridge for measuring pressure. My speer reloading manual shows a drawing on the copper crusher method to find (c.u.p.) pressure ratings JDG

January 1, 2006, 09:26 PM	#5
saands Senior Member Join Date: November 14, 1999 Posts: 1,573	I think that JDG nailed this one ... I was trying to figure out why a cylinder would have a perfectly round defect in it. As this is once fired, whatever external artifacts that may have been there from the factory would be trounced by artifacts in the cylinder. I would still let brassman know that he is sourcing some dubious brass. Saands

January 8, 2006, 02:19 AM	#6
kcoop9999 Member Join Date: August 21, 2005 Location: Soutern Iowa Posts: 29	JDG took my guess. This looks like it's been through a pressure barrel.

January 8, 2006, 05:27 PM	#7
impact Senior Member Join Date: January 8, 2005 Location: the great state of Texas Posts: 854	I would keep the case in my collection of odd things. Thats unique! I never saw a case like that before.