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What caused my case to do this? (Help)

 
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  #1  
Old 10-10-2011, 03:09 PM
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Join Date: Nov 2010
Location: Grand junction, co
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What caused my case to do this? (Help)

I have a 30-378 Weatherby that i handload for, everything has been fine except these two cases. All the rest of the rounds that i have fired have been fine all 180 of them. These seem to have folded in just behind the shoulder after i fired them, again this was after i ejected the round i discovered the defect, was fine when i loaded the round. these were around 20 rounds apart as well. any thoughts? Thanks
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Old 10-10-2011, 03:17 PM
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Location: Townsend, Montana.
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Re: What caused my case to do this? (Help)

It looks like a low powder charge. If you are at the low end of the scale bump up the charge a bit. Or select a different powder.

Jeff
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Old 10-10-2011, 03:25 PM
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Re: What caused my case to do this? (Help)

Yeah might be it. but the load data that i got from berger was
210 Grain H1000 94.5 99.5 90.8% fill ratio
and im loading at 97.0 so its not to low by their standards.
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Old 10-10-2011, 03:25 PM
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Re: What caused my case to do this? (Help)

What are your velocities?
Do they seem out of line?
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Old 10-10-2011, 03:30 PM
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Re: What caused my case to do this? (Help)

I haven't chronographd them in a while but they were around 2910 seemed close to bergers estimation and others guestiments... maybe i will again.
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Old 10-10-2011, 03:55 PM
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Location: Grand junction, co
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Re: What caused my case to do this? (Help)

here is what the Snipers hide guys are thinking

What caused my case to do this? (Help) - Sniper's Hide Forums

Thanks
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  #7  
Old 10-10-2011, 09:00 PM
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Join Date: Aug 2011
Location: Lynchburg, TN
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Re: What caused my case to do this? (Help)

The same thing has happened on smy 7 RUM. It's caused by the freebore that Weatherby and by Remington in it's Ultra Mag shells. They have lots of freebore like the Weatherby. It has something to do with the seating depth of the bullet and the freebore allowing gas to bypass past the neck which does not seal With mine it was with a Berger 180 gr. VLD. I'm guessing you were using a VLD also.
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