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Sierra 69 grain .224 bullet length?

Discussion in 'Handloading and Reloading' started by Vicious-Peanut, Feb 27, 2008.

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  1. Vicious-Peanut

    Vicious-Peanut Member

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    Hello everyone, I am trying to find out the bullet length of some of the popular 68 and 69 grain match bullets but am have no luck. Does anyone know or have some they could measure?

    Thanks a million
     
  2. rodregier

    rodregier Member

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    69g, think it's the Sierra - 0.880"

    Just remember the Greenhill twist rate formula doesn't work very well for BTHPM projectiles.
     
  3. Hoosier Reloader

    Hoosier Reloader Member

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  4. jhansman

    jhansman Member

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    My Sierra 69 gr. SMKs miked out at .895", if that helps.
     
  5. wworker

    wworker Member

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    Ok, I give up. What is a BTHPM projectile?
     
  6. Grumulkin

    Grumulkin Member

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    That would be Boat Tail Hollow Point Match.

    What is your barrel's twist, by the way? If it's 1:12 or slower it's highly unlikely that it will shoot 69 grain match bullets accurately. A 1:8 twist barrel should shoot them just fine.
     
  7. Vicious-Peanut

    Vicious-Peanut Member

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    Sorry to dig this up, but my twist is 1:10 18.5".
     
  8. rodregier

    rodregier Member

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    1:10 18.5" - sounds like a Mini-14.

    Stability of Sierra 69g in my prior similar Mini-14 was fine, if you ignored the walking zero as the barrel heated up :-(

    Hornady 68g HPBTM projectile should be fine in that twist rate too.
     
  9. Vicious-Peanut

    Vicious-Peanut Member

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    I dont have much of an issue with the barrel walking due to the Accu-strut. Sound like I'll have to try these then. :)
     
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