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Thread: Diameter rule

  1. #1
    Boolit Bub
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    Diameter rule

    What is the diameter rule??? I read a post that member Manley stated something about the
    diameter rule???

  2. #2
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    dromia's Avatar
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    What was it in relation to?

    Seating depth?


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  3. #3
    Boolit Master
    CastingFool's Avatar
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    The only thing I can think of is a starting load for BP RB loads. Whatever the diameter of the bore, that's your starting load, so lets say you have a .50 cal ML, you start out with 50 gr of BP, and so on. Or, multiplying a diameter by PI, (3.1416) will give you the circumference of a circle.

  4. #4
    Boolit Master
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    Regarding boolits, maybe the rule of thumb where we often hear and say the boolits should be sized to be .001" over the slugged diameter of the firearm barrel.

    Then there is the one about shot guns and "square loads" and all of that.

    prs

  5. #5
    Boolit Master sthwestvictoria's Avatar
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    The diameter rule that you can only beat your wife with a switch that is less than the diameter of your thumb? I think the shoe would be on the other foot if I tried that with SWMBO.

    More usefully as Dromia suggests there is a rule that a bullet should be seated a minimum of one calibre diameter into the case neck.
    ars longa, vita brevis

  6. #6
    Boolit Master
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    Quote Originally Posted by sthwestvictoria View Post
    The diameter rule that you can only beat your wife with a switch that is less than the diameter of your thumb? I think the shoe would be on the other foot if I tried that with SWMBO.

    More usefully as Dromia suggests there is a rule that a bullet should be seated a minimum of one calibre diameter into the case neck.
    I think the rule is her thumb not your thumb

    Tim
    Words are weapons sharper than knives - INXS

    The pen is mightier than the sword - Edward Bulwer-Lytton

    The tongue is mightier than the blade - Euripides

  7. #7
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    I think he may have meant the one-two thou over groove diameter.
    it's something else I ignore.

  8. #8
    Boolit Master
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    Rools, we don't need no stink'n rools.........

    prs

  9. #9
    Boolit Master Hannibal's Avatar
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    It would seem there are few 'RULES', but any number of 'SUGGESTIONS'.

  10. #10
    Boolit Master
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    Quote Originally Posted by runfiverun View Post
    I think he may have meant the one-two thou over groove diameter.
    it's something else I ignore.
    I think runfiverun has it ..... .002" over JMHO
    " Associate with men of good quality, if you esteem your own reputation: for it is better to be alone than in bad company. " George Washington

  11. #11
    Boolit Master

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    You really need to let the gun tell what diameter it wants!!
    Calamity Jake

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    Shoot straight, keepem in the ten ring.

  12. #12
    Boolit Master



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    Case neck length is my guess. Needs to be one diameter in length from shoulder to mouth on bottleneck cases.
    Marty-hiding out in the hills.

  13. #13
    Boolit Master

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    The diameter rule, bigger is better... In calibers you dirty old men!

  14. #14
    Boolit Master
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    Quote Originally Posted by Moonie View Post
    The diameter rule, bigger is better... In calibers you dirty old men!
    I do size mine BIG!
    " Associate with men of good quality, if you esteem your own reputation: for it is better to be alone than in bad company. " George Washington

  15. #15
    Boolit Master

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    Diameter rule=
    A cloth tape measuring device for measuring the D.B.H. (diameter at breast height) of trees.
    Used primarily in Silva culture work.




    Pepe Ray
    The way is ONLY through HIM.

  16. #16
    Boolit Grand Master
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    I thought it was a device where you I put the diameter and it gave you the size of each piece of Pi......
    You will learn far more at the casting, loading, and shooting bench than you ever will at a computer bench.

  17. #17
    Boolit Master
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    C over pie
    Words are weapons sharper than knives - INXS

    The pen is mightier than the sword - Edward Bulwer-Lytton

    The tongue is mightier than the blade - Euripides

  18. #18
    Boolit Grand Master
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    We have covered the diameter rule to the Nth degree?
    You will learn far more at the casting, loading, and shooting bench than you ever will at a computer bench.

  19. #19
    Boolit Buddy scaevola's Avatar
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    This is a very informative thread. I now know the 'diameter rule' always refers to pie:

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