COTEP.org - Ever see a crimp like this???

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- - Ever see a crimp like this??? (https://www.cotep.org/forum/showthread.php?t=13429)

Quote:

Originally Posted by Blackgun (Post 137656)

I have some old semi auto ammo with a crimp like that.

Welcome to the forums.

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)
http://i1268.photobucket.com/albums/...pss51uspai.png

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:
http://i1268.photobucket.com/albums/...ps18m7f2p0.png

http://www.cotep.org/forum/picture.p...pictureid=1046

Quote:

Originally Posted by Caleb (Post 137658)

Welcome to the forums.

Thanks!!

Quote:

Originally Posted by Riverpigusmc (Post 136355)

I've seen it on certain brands yup

Me too, Aguila 9mm