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#3184089 - 03/05/13 10:43 AM Re: turning case necks? [Re: mr.big]
EastTNHunter
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Registered: 03/08/10
Posts: 3131
Loc: Rhea Co., TN

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 Originally Posted By: mr.big
may need to set your size die a little shorter also,,


^^^^^^^^^^

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#3184259 - 03/05/13 01:57 PM Re: turning case necks? [Re: DaveB]
Hunter 257W
10 Point


Registered: 10/04/12
Posts: 3522
Loc: Franklin County

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Just to clarify something here that I think is misunderstood. Turning Case necks means to remove metal from the outside diameter of the entire length of the case neck much as a metal turning lathe does. That is different from Trimming case necks which simply shortens a case by cutting the face of the neck. Usually nobody turns necks except for benchrest rifles or very accurate varmint rifles. On the other hand, trimming necks is common because all cases tend to grow in length each time they are loaded and will eventually jam into the front of the chamber. The case mouth is then forced to swage into the bullet which causes chamber pressure to rise which is not a good thing. \:\)

It's always a good idea to check case length against a Manual every time you reload a batch of cases. Then if a few are starting to reach or exceed the Max, trim the whole batch back to the Min length.


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#3184274 - 03/05/13 02:08 PM Re: turning case necks? [Re: Hunter 257W]
Hunter 257W
10 Point


Registered: 10/04/12
Posts: 3522
Loc: Franklin County

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Mr. Big may have the answer. When setting up a sizing die you have a little latitude to vary die depth in the press and still produce safe ammo. It's acceptable to just let the bottom of the die "kiss" the shell holder or turn the die down another 1/8 turn or so. You may have a shorter than average chamber that would benefit from turning the sizing die into the press maybe 1/8 turn beyond 1st contact with the shell holder. If it were mine, I'd go half that distance and see how it feels. You don't want to go too far and create an excessive headspace problem. That will lead to case head separations which is not fun!
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