finding twist rate?

Discussion in 'The Ammo & Reloading Forum' started by me2, Feb 24, 2010.

  1. me2

    me2 New Member

    Feb 23, 2010
    Hi yall got a question. how do you tell what the twist rate is on a gun barrel? i have a nef 223 single shot and i cant find any stampings on it to say.. i want to reload some for it but am looking at different size lead vs the twist rate. thanks for the help..

    PS: great board here, i was up till 11pm last night reading here and back again today LOL :) :cool:
  2. Alpo

    Alpo Well-Known Member

    Feb 3, 2007
    NW Florida
    There's three ways.

    Many reloading manuals have a table with the twist rate of various guns in it.

    You could call the company and ask them.

    Or, you could measure. Take a cleaning rod with a tight-fitting patch. Push it into the barrel a couple of inches. Mark the rod with a Sharpie (or something similar) at some type of index mark (the front sight works real good for that), horizontally at the muzzle. Draw a vertical line up the rod for maybe twenty inches (to be safe), in line with the index mark. Now, push the rod down the barrel. The tight patch will follow the rifling, the rod will turn. When the rod makes one complete circuit, which you will know because your vertical line is now at the index mark again, make another horizontal mark at the muzzle. Remove the rod and measure the distance between the two horizontal marks. The distance between the marks is one complete turn, so - one turn in 8 inches, or one turn in 15 inches, or whatever. There's your twist. I suggest you make your vertical line about 20 inches, because most smokeless cartridges have a twist faster than 1-in-20.

  3. artabr

    artabr New Member

  4. deadin

    deadin Well-Known Member

    May 16, 2006
    No kidding!! He makes it absolutely anal.:D

    I wonder how he would handle a gain twist?;)
  5. cakes

    cakes New Member

    Oct 23, 2009
    Northern Maine
    OR... You can shoot a few bullets of varying weight, and see which your rifle prefers.
  6. JLA

    JLA Well-Known Member

    Feb 26, 2007
    Heart Of Texas
    heres a link to a barrel twist calculator. It finds the particular twist needed to properly stabilize a particular bullet...

    The easiest way to determine the twist in yor particular firearm barrel is as described by alpo in the second post of this thread... the ol cleaning rod method...
  7. me2

    me2 New Member

    Feb 23, 2010
    Thanks Yall for all the help !!! :D
  8. That's what I love about this forum..... :D

    An excellent question followed by excellent answers.... :)
  9. me2

    me2 New Member

    Feb 23, 2010
    i dont know about excellent Question but defenitly excellent answers LOL
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