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Case neck consistency

Discussion in 'Handloading and Reloading' started by j2crows, Mar 28, 2011.

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  1. j2crows

    j2crows Member

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    This is probably a crazy question but, I don't know so I'm asking. What is the best way to ensure inside case neck consistency to aid in smooth seating of a bullet. I currently use Win. cases and sometimes when seating bullets some go in as smooth as could be and some seem to, "drag" a bit while seating. I use Forester bench rest dies. Neck size only.
     
  2. lightman

    lightman Member

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    I run a spinning bore brush in and out.A piece of 4/0 steel wool would do the same thing.Forster also makes a little reservoir thing that holds motor mica or graphite and has a few nylon brushes mounted in it. Lightman
     
  3. 918v

    918v Member

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    You can't. Each case is unique. If you wanna sort them by neck tension, get a K&M arbor press with a strain gauge. You will be able to measure seating pressure for each round as you seat.
     
  4. ghostwriter

    ghostwriter Member

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    make sure you trim the neck thickness uniformly too. After you do this, and fire them, you'd be amazed at how uniform the bullet tension becomes.
     
  5. Afy

    Afy Member

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    Trun necks, neck size for about 0.03 neck tension, use an arbor press.
    IMHO wont make a real difference unless you are consistently shooting sub 0.3 MoA groups consistently. Its like bullet concentricity or weight sorting your cases.
     
  6. dagger dog

    dagger dog Member

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    "Lube" the case necks with powder mica, that way you don't have to remove any liquid lube, Frankford Arsenal makes a litlle lube station with brushes, for very little $.

    The mica also helps in uniform bullet "grip" case neck to bullet tension, and will give you better SD numbers in velocity threfore better uniformity in you handloads.
     
  7. jb27

    jb27 Member

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    Dumb question. Are you 'lubing' the case necks before sizing or before bullet seating?
     
  8. 918v

    918v Member

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    Placing lube between the bullet and the neck in a bottlenecked cartrige reruces friction between the two and compromises cartrige integrity during feeding.
     
  9. dagger dog

    dagger dog Member

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    Before, if full length sizing, it helps the sizer ball slide through the neck on its way out and is supposed to help stop stretching the neck area, before seating if using a mandrel type neck die to aid in uniform bullet grip. Guess you can use it with a bushing die also.

    You may have a point if the cartridge is shot in a magazine rifle! Single shot not so, we are talking powder mica not a liquid lube.
     
    Last edited: Mar 29, 2011
  10. 243winxb

    243winxb Member

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    Forster Precision Plus Bushing Bump Neck Sizer Die

    Outside neck turn your brass and use a bushing die. Made by Redding, RCBS Others.
    http://www.forsterproducts.com/catalog.asp?prodid=701004
     
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