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Thread: Hornady sub-x 175gr load data...

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  1. #4
    Member
    Join Date
    Dec 2021
    Location
    Tauranga
    Posts
    5,886
    Quote Originally Posted by longshot View Post
    12.7 gr TB for 1061 fps

    found at
    https://hodgdonreloading.com/rldc/

    although I note that at
    https://hodgdonpowderco.com/wp-conte...ta-final-1.pdf

    it is 10.5 gr TB for 1039fps with the 190gr sub-x


    FWIW I use 10.0 gr TB with 165gr projectiles for subsonic .308, 18" barrel, 1/10 twist.
    Yep seen that, hence why I'm cross checking.

    Their data off the website doesn't appear to make sense...

    190gr Sub-X - TrailBoss - 2.690 length - Max powder 10.5gr - Vel. 1039fps - Pressure 30100psi
    175gr Sub-X - Trailboss - 2.495 length - Max powder 12.7gr - Vel. 1061fps - Pressure 27200psi

    2.2 gr extra powder for the 175gr pill, I realise it's a little shorter than the 190gr but seated almost 5mm shorter for 22fps extra speed yet 2900psi lower pressure? I think I'm missing something or overthinking it, but 2.2gr extra powder for 2900psi less pressure indicates something I haven't experienced with Trailboss before. This is why I've asked on here if someone has actual real world results, as the info I have is basically the opposite of what I'd expect!

 

 

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