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  • Can more be less?

     Josh updated 11 months, 2 weeks ago 1 Member · 1 Post
  • Josh

    Member
    December 15, 2019 at 9:25 am

    The 77gr Tipped Matchking from Sierra is one of the most highly regarded bullets available in .223 or 5.56 for defensive use. But a viewer expressed concern that maybe this bullet wouldn’t penetrate as deeply if it were moving faster. So we’re going to fire a 77gr Sierra TMK from my 20” Colt AR-15 A2 into calibrated 10% ordnance gelatin.

    Penetration: 9.5″
    Retained weight: 26.4gr
    Max expansion: 0.554″
    Min expansion: 0.349″

    Velocities in fps:
    2,782
    2,782
    2,782
    2,752
    2,450
    2,737
    Average: 2,714
    StdDev: 130.8
    Min: 2,450
    Max: 2,782
    Spread: 332

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