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Weatherby Rounds!
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<blockquote data-quote="J E Custom" data-source="post: 1677916" data-attributes="member: 2736"><p>There are many reasons to crimp or not to crimp. Weatherby used to crimp ALL of there Magnums and many other ammo makers did. But with all the emphasis on Bullet BC now, bullet Canelures are almost</p><p>extinct so crimping is almost gone.</p><p></p><p>The problem is that some cartridges still perform better crimped. A re loader can find out very easy if he wants to by testing.</p><p></p><p>I have improved SDs by crimping some cartridges as long as I had bullets with canelures for them. Most people assume that a crimp is used solely to prevent the bullet from being pushed back in the case when another round is fired. This is the main purpose on straight sided cases that don't have the grip that shouldered can have. but on some loads, it helps the powder to get a more even burn rate. Improved loading practices can all but eliminate this so the need is not as great anymore, And fewer and fewer bullets can be found with a canelure.</p><p></p><p>Over crimping can cause more problems, and should be avoided at all cost.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1677916, member: 2736"] There are many reasons to crimp or not to crimp. Weatherby used to crimp ALL of there Magnums and many other ammo makers did. But with all the emphasis on Bullet BC now, bullet Canelures are almost extinct so crimping is almost gone. The problem is that some cartridges still perform better crimped. A re loader can find out very easy if he wants to by testing. I have improved SDs by crimping some cartridges as long as I had bullets with canelures for them. Most people assume that a crimp is used solely to prevent the bullet from being pushed back in the case when another round is fired. This is the main purpose on straight sided cases that don't have the grip that shouldered can have. but on some loads, it helps the powder to get a more even burn rate. Improved loading practices can all but eliminate this so the need is not as great anymore, And fewer and fewer bullets can be found with a canelure. Over crimping can cause more problems, and should be avoided at all cost. J E CUSTOM [/QUOTE]
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