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7RUM case denting when firing (pic)

 
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  #15  
Old 11-09-2008, 05:19 PM
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Re: 7RUM case denting when firing (pic)

Thanks. I see the "any date" option there now.
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  #16  
Old 11-09-2008, 06:27 PM
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Re: 7RUM case denting when firing (pic)

If anyone is interested, my post was "Need some help on this one" dated 061403 and found in forum; Rifles, Bullets, Barrels and Ballistics, page 308. Warren Jensen was correct from the get-go.
db

Last edited by dbhostler; 11-09-2008 at 07:11 PM.
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  #17  
Old 11-09-2008, 09:57 PM
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Re: 7RUM case denting when firing (pic)

Thanks for the details of your post from '03 db. I looked it up and read Warren's description...exactly what I had thought from the beginning.
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  #18  
Old 11-12-2008, 03:06 PM
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Re: 7RUM case denting when firing (pic)

Update: I almost doubled the amount of bearing surface inside the neck of the case (from 0.073 to 0.140) and tested the same range of powder charges as I had tried previously.

The result was as expected with the case expanding enough to seal the chamber before the bearing surface exited the case.
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