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300 ultra case damage

 
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  #1  
Old 05-26-2006, 02:48 PM
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Join Date: Mar 2005
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300 ultra case damage

I am wondering if anyone would know what happened.I fired
a round with 86 grains of Retumbo,200 Accubond,Fed215m primer COL at 3.595" Fired like any other round except that
when i removed the case there was a 1/16 dia hole just below the shoulder.I have never used this powder before and I did not fire anymore until i find out what happened. The brass i used was shot maybe 3 times prev. with different loads. Suggestions??
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  #2  
Old 05-26-2006, 03:21 PM
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Re: 300 ultra case damage

My guess would be a bad case. Just chunk it and go on. I'm shooting 85 gr Retumbo under a 240 SMK so I don't think your over pressure.
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  #3  
Old 05-26-2006, 06:08 PM
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Re: 300 ultra case damage

Agree with Bill Bailey, I'm using 92 grains of Retumbo with Berger 210 gr. bullet. MV = 3025 ft/s.
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  #4  
Old 05-26-2006, 08:17 PM
 
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Re: 300 ultra case damage

I also agree with Bill as I'm using 85grs of Retumbo with the 240 SMK too, 2855 fps out of a 29" Lilja.
Wayne aka WAMBO
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  #5  
Old 05-26-2006, 08:23 PM
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Re: 300 ultra case damage

[ QUOTE ]
I also agree with Bill as I'm using 85grs of Retumbo with the 240 SMK too, 2855 fps out of a 29" Lilja.

[/ QUOTE ]

That sounds exactly like my setup!! I believe my bbl is just a smidge shy of 30" though. Getting the same velocity.
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  #6  
Old 05-26-2006, 08:40 PM
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Re: 300 ultra case damage

That load sounds like its a little on the lighter side. 85 grains under a 240 is a lot different than 86 with a 200 acc. 86 with the 200 should be on the bottom end. My thought is under pressure. I've had a 7rum and a 300 rum, sometimes with light loads they would dent right on the edge of the shoulder. Never had a hole though. The gases pass down the side of the neck before it seals the chamber.
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  #7  
Old 05-26-2006, 10:09 PM
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Join Date: Mar 2005
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Re: 300 ultra case damage

The reason for the 86 is the loads on the internet i seen started at 89.5 thought i would work up to. I dont have the Reloading manual for that powder. I guess i will try the other rounds and see what happens....
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