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#1
09-29-2016, 02:17 PM
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Not a crimp, it's a cannelure, usually seen on bullets but sometimes on premium cases to help prevent bullet setback, as others have mentioned.
Here are some that I have (Aguila, Cor-Bon, WCC, and the last three Federal)  Notice the three Federals all are at different depths. I presume for different bullet weights (230, 200 and 180) I have a box of Federal Premium 230 grain HST with the cannelure: 
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Jim CBOB0497 "That rifle hanging on the wall of the working class flat or laborer's cottage is the symbol of democracy. It is our job to see that it stays there." - George Orwell Last edited by DrHenley; 09-29-2016 at 02:20 PM. 
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#2
09-29-2016, 06:16 PM
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Quote:
Thanks!!
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DW CBOB | S&W Performance Center 629 Snubbie | S&W Performance Center 627 Snubbie | S&W 1911SC | Sig P938 | Sig P226R SC | 2 Sig 1911s | One Lonely Mimber CDP Pro
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#3
09-29-2016, 06:19 PM
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Big ol crimp on this one.
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DW CBOB | S&W Performance Center 629 Snubbie | S&W Performance Center 627 Snubbie | S&W 1911SC | Sig P938 | Sig P226R SC | 2 Sig 1911s | One Lonely Mimber CDP Pro
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