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<blockquote data-quote="alank2" data-source="post: 1497181" data-attributes="member: 108">Hi,Crimping depends on the cartridge.Bullets that have a cannelure like many revolver and rifle cartridges will have their case bullet tension increased by roll crimping the case into the cannelure.Many automatic cartridges however do not have a cannelure to crimp into and these cartridges use a taper crimp which doesn&#039;t roll the brass into a cannelure.&nbsp; Their entire case bullet tension is based on how tight the brass was sized in the first place.&nbsp; For these you only want to crimp enough to remove the belling you added to the case to easily seat the bullet.For 40s&amp;w if you are using a good sizing die, you should be able to seat a bullet in an empty case, taper crimp to the remove the bell, and the bullet should want to stay put pretty well if you put pressure on it to force it into the case.&nbsp; It isn&#039;t to say that you can&#039;t push it in with enough force, but it should be easy...Good luck,Alan</blockquote>

[QUOTE="alank2, post: 1497181, member: 108"] Hi, Crimping depends on the cartridge. Bullets that have a cannelure like many revolver and rifle cartridges will have their case bullet tension increased by roll crimping the case into the cannelure. Many automatic cartridges however do not have a cannelure to crimp into and these cartridges use a taper crimp which doesn't roll the brass into a cannelure. Their entire case bullet tension is based on how tight the brass was sized in the first place. For these you only want to crimp enough to remove the belling you added to the case to easily seat the bullet. For 40s&w if you are using a good sizing die, you should be able to seat a bullet in an empty case, taper crimp to the remove the bell, and the bullet should want to stay put pretty well if you put pressure on it to force it into the case. It isn't to say that you can't push it in with enough force, but it should be easy... Good luck, Alan [/QUOTE]

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