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Premium Member
3,364 Posts
About those Lee Collet dies.  I too will agree that they really don't give much neck tension.  As mentioned this aids in start pressure and can enhance overall velocity yield of a given load.

My solution to this has been to take the neck mandrel, chuck it up in the lathe (or a drill press) and hit it with crocus cloth, and very carefully reduce it's diameter, testing its effectiveness every now and again by reinstalling in the die, and actually sizing a case or two, until the desired amount of neck tension is obtained.   It is an easy modification to these excellent dies, and can give great rewards in terms of performance.

Just a quick thought on the subject!

God Bless,

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