Thread: .357 Sig
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Old 01-27-2010, 03:05   #4
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Join Date: Apr 2008
Posts: 756

chamfer means to sightly bevel the inside of the case mouth so the bullet dosn't hang up on it when seating, you can also chamfer the outside of the case mouth which helps with feeding the round into the chamber.

case mouths get flared during charging when using a case activated powder measure like the Lee disc powder measure or a die spacificaly designed to flare the case. Case flaring helps with seating the bullet, pretty common when loading lead bullets.

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