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So I’m sighting in my .505 and Delta point and all is going well and hit the 50 yard target dead center and eject the case. I may have heard something strange while firing. The ejected case has 2 small longitudinal splits near the base side by side with gas ejecting from either end. Never seen anything like it nor has Wayne at AHR. This was Corbon expedition safari factory ammo and Jamison brass (new I assume). I have shot quite a bit of this no problem. I have a pic but alas I am a poor poster if anyone wants to help me out. I am pissed as I have a lot of this ammo. Already leaving messages at cor bon.

Any ideas?


White Mountains Arizona
 
Posts: 2840 | Registered: 31 December 2005Reply With Quote
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Originally posted by gunslinger55:
Jamison brass..

Any ideas?


They had, a couple years ago - (before they were bought), a problem with 505 and cheytech brass ... contact corbon


#dumptrump

opinions vary band of bubbas and STC hunting Club

Information on Ammoguide about
the416AR, 458AR, 470AR, 500AR
What is an AR round? Case Drawings 416-458-470AR and 500AR.
476AR,
http://www.weaponsmith.com
 
Posts: 38379 | Location: Conroe, TX | Registered: 01 June 2002Reply With Quote
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That would explain it. On another forum consensus is bad brass


White Mountains Arizona
 
Posts: 2840 | Registered: 31 December 2005Reply With Quote
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So Jamison International went tango uniform from illegal international arms shipping? WTF


White Mountains Arizona
 
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On another big bore forum someone had the identical double split gas ejection issue on some factory sako ammo. Very strange


White Mountains Arizona
 
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I had that happen several years ago with some handloads made using Bell brass.

I pulled the bullets, dumped the powder, fired the primers and destroyed the cases.

Not sure exactly why, but I’m convinced it was bad brass. Never had a problem with any other ammo I ever shot in that rifle.


Mike

Wilderness is my cathedral, and hunting is my prayer.
 
Posts: 13329 | Location: New England | Registered: 06 June 2003Reply With Quote
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Seems Corbon is ignoring me. Time for another call I guess


White Mountains Arizona
 
Posts: 2840 | Registered: 31 December 2005Reply With Quote
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The great run around and BS is being started by the Cor Bon people. Hoky outfit by the sounds of it. Did they change management and get bought out or something?


White Mountains Arizona
 
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Cor-Bon new ownership has stated they take no responsibility for ammo made under old ownership


White Mountains Arizona
 
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The more I learn about the "new" cor-bon be advised to stay well away...


White Mountains Arizona
 
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I bought a batch of Jamison .505 Gibbs brass earlier this year, loaded 20 with a midrange load and the first 4 I shot split thru the shoulder and into the neck. Haven’t shot any more of them.


Karl Evans

 
Posts: 2723 | Location: Emhouse, Tx | Registered: 03 February 2010Reply With Quote
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OK maybe ill track down Jamison but they went under as well Cheytac bought them supposedly


White Mountains Arizona
 
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I have shot about 120 and this is the first one I noticed. Still have 180 left not willing to throw them away


White Mountains Arizona
 
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Do they look like this?



I destroyed mine because that is plasma cutting and will ruin a rifle barrel.

Luckily, I only fired a couple before I realized what was happening.


Mike

Wilderness is my cathedral, and hunting is my prayer.
 
Posts: 13329 | Location: New England | Registered: 06 June 2003Reply With Quote
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Yep pretty similar. The amount of ammo I have is way more expensive than a new barrel. What type of brass was that?


White Mountains Arizona
 
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I've only had one do it so far. I guess I'll see if more fail.


White Mountains Arizona
 
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Went through all my spent 505 brass and one with a single slit abs one that has a dual slit. So not a common issue but still concerning


White Mountains Arizona
 
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Originally posted by Michael Robinson:

First thought on seeing that was: SAAMI .458 Lott trying to keep up with the .458 WIN+P+L 3.8". Big Grin

Last time that BELL .458 Lott brass was discussed, over a decade ago, IIRC, seems like big suspects were
- improper annealing of the brass cups before or between the early steps of the draw
- impurity or inclusions in the brass raw material
- exposure to ammonia somehow along the way degraded the brass
 
Posts: 28032 | Location: KY | Registered: 09 December 2001Reply With Quote
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Jeeze Louisez, or something like that!! scary stuff I figure..Never ever have I seen this, old worn out brass with a slit in front of the belt or a head seperation, but nothing like this...


Ray Atkinson
Atkinson Hunting Adventures
10 Ward Lane,
Filer, Idaho, 83328
208-731-4120

rayatkinsonhunting@gmail.com
 
Posts: 41761 | Location: Twin Falls, Idaho | Registered: 04 June 2000Reply With Quote
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I had the necks of my .505 Jamison brass split in my .375/ Gibbs .505. Admittedly loaded high pressure with 141 g Retumbo. Velocity 3270 fps. I was only getting 3-5 reloads.
 
Posts: 485 | Registered: 16 April 2012Reply With Quote
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That’s a beast. These are new brass factory pressure (low)so much becsone defective


White Mountains Arizona
 
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