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Lee collet die vs. rcbs neck die

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  #1  
Unread 10-01-2013, 01:11 PM
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Lee collet die vs. rcbs neck die

Hey guys, I have the .300 win mag lee collet die and rcbs neck sizing die which is better and why?
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  •   #2  
    Unread 10-01-2013, 02:53 PM
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    Re: Lee collet die vs. rcbs neck die

    Try both and see.

    I've used both for a 7mm magnum, and the loads shot identically. I could not tell the difference with that ammo in that rifle.

    Having said that I would generally put a neck bushing die ahead of a collet die for repeatability, and I'm contemplating a Redding bushing die for my 270 since I can't get what I want with a Lee collet die with regard to consistent neck sizing.
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      #3  
    Unread 10-01-2013, 05:10 PM
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    Re: Lee collet die vs. rcbs neck die

    LEE COLLET

    PROS - straighter ammo (less runout), no lube in neck, more consistant ID
    CONS - less bullet grip (unless you order a smaller mandrel or sand one down), learning curve

    RCBS EXPANDER TYPE NECK SIZER

    PROS - no learning curve
    CONS - lube in neck, more runout


    UHHH...................Lee Collet much better IMO
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      #4  
    Unread 10-01-2013, 07:53 PM
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    Re: Lee collet die vs. rcbs neck die

    Lube in neck? Not here, never. NADA.

    I like them both actually.
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      #5  
    Unread 10-02-2013, 01:06 AM
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    Re: Lee collet die vs. rcbs neck die

    Quote:
    Originally Posted by woods View Post
    LEE COLLET

    PROS - straighter ammo (less runout), no lube in neck, more consistant ID
    CONS - less bullet grip (unless you order a smaller mandrel or sand one down), learning curve
    Sir, would you mind elaborating a bit on this. How would I go about determining the amount of grip being applied and what size smaller mandrel would be needed for 300WM? By sanding down a collet mandrel, wouldn't that increase the ID on the mandrel somewhat?

    Thanks,

    DocB
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      #6  
    Unread 10-02-2013, 07:54 AM
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    Re: Lee collet die vs. rcbs neck die

    I am still at a complete and total loss as to the fascination with Neck Dies. Problems, plain and simple, just looking for a place to happen. They don't increase accuracy over F/L sizing, and assuming the F/L dies are set up properly, they don't add a bit of case life.
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      #7  
    Unread 10-02-2013, 06:53 PM
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    Re: Lee collet die vs. rcbs neck die

    Quote:
    Originally Posted by DocB View Post
    Sir, would you mind elaborating a bit on this. How would I go about determining the amount of grip being applied and what size smaller mandrel would be needed for 300WM? By sanding down a collet mandrel, wouldn't that increase the ID on the mandrel somewhat?

    Thanks,

    DocB
    The amount of grip is up to you. General consensus is bullet grip from .001" to .003" (less than diameter of bullet)

    You can get an approximation of bullet grip by measuring outside neck diameter of a sized but unloaded case and a loaded case, subtract the 2. Not very accurate

    There are other tools. I use a set of pin gauges





    You can order mandrels from Lee in whatever diameter you want (minimum order applies, $15.00 or more IIRC)




    Some prefer to chuck the mandrel in a drill and hold sandpaper on it. I had miserable results with that, hard to get consistent results from top to bottom and keep it perfectly round, YMMV
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