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Thread: 10.5 vs 14.7 vs 18 Velocity/Powder/Bullet

  1. #11
    Join Date
    Apr 2017
    Location
    Great lakes
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    Quote Originally Posted by joeg26er View Post
    I tried velocity tests on a mid length TRIARC 12.5" AR-15 TRACK Barrel 2.0 with NP3 Barrel extension Chambered in 5.56mm
    Slr7 adjustable gas block
    Brownells lw nitride bcg
    Wolf gold 55gr From 2820-2850
    Sellier n Bellot 55gr light green box. 2980 to 2890
    IMI 55gr 2823-2750
    Tula steel case 55gr. 2780-2816
    In comparison on the same chronograph
    An hk 33 with 16” barrel ran about 50fps faster
    Maximum velocity was 3,000 with the green box S&B 55gr
    Any speculation on how you were able to get such high velocities out of a 12.5" barrel?

  2. #12
    Join Date
    Jul 2012
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    560
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    The triarc track 2.0 barrel uses single edge polygonal rifling
    Now I’m curious what velocity the Triarc 14.5 gets but I’m going to be pretty satisfied with this barrel as it’s light and handy without much velocity penalty

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