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fireforming cases.

 
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  #8  
Old 09-01-2006, 12:16 PM
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Re: fireforming cases.

had a nick in the chamber shoulder(long story, dont lend you pets to your friends [img]/ubbthreads/images/graemlins/mad.gif[/img] [img]/ubbthreads/images/graemlins/mad.gif[/img]) that had to be recut/polished out. moved the shoulder .010 out of standard specs...i fireform so they are snug to my chamber.
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  #9  
Old 09-01-2006, 01:17 PM
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Re: fireforming cases.

That makes more sense. try this link

http://longrangehunting.com/ubbthreads/s...rt=all&vc=1

d-a
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  #10  
Old 09-01-2006, 04:11 PM
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Re: fireforming cases.

WEll I have one of Kirby's works and it requires fireformed cases. Here is a group I shot with fire form loads, using 150gr Nosler Solid bases and 872, at 200yds.


I have also gotten some very impressive goups using standard cases in Ackley chambers during forming.

Your milage may vary, good luck.
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  #11  
Old 09-02-2006, 10:04 AM
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Re: fireforming cases.

In a 300RUM, 200AB, US869, I've noticed different POI with fireformed cases vs. virgin--about 1" at 100yds. I don't recall noticing this with other loads. Accuracy was similar but just a bit worse it seemed with virgin brass. After fireforming the neck turning is able to help out a bit and that may be part of what I was seeing. Good luck.
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  #12  
Old 09-02-2006, 10:59 AM
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Re: fireforming cases.

I thought you might like to see my attemp at making 300Wby brass out of 257Wby brass. They were just annealed 1 firing ago. I just can't figure out why this didn't work. So much for cheap 300Wby brass. [img]/ubbthreads/images/graemlins/mad.gif[/img]

Seriously, this was an accident. I just did this yesterday while testing at the range. I only use Accubonds so at first glance they all look the same. This was a max load with a .257" 110 Accubond fired in my 300Wby Accumark. At the shot it just went pop! There was no recoil and the chronograph read 1656fps. We were shooting at 200 yards and had been printing nice 5/8" groups back to back off the bags. This one didn't even hit the paper.




I wonder if my Lee die will iron this out? [img]/ubbthreads/images/graemlins/confused.gif[/img]
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