Andrew from The Chopping Block tests Speer 75 Grain Gold Dot ammunition.
.223 Rem Speer 75 gr Gold Dot fired from 1:9" twist, 11.5" AR and 1:7" twist 20" AR into bare, calibrated 10% ordnance gelatin and through a windshield into clear gel.
BB: 585.1 fps, 3.5"
11.5" SBR:
Velocity: 2,370 fps
Penetration: 19.5"
Retained weight: 73.0 gr
Max expansion: 0.563"
Min expansion: 0.305"
20" Rifle:
Velocity: 2,774 fps
Penetration: 15.2"
Retained weight: 66.2 gr
Max expansion: 0.686"
Min expansion: 0.382"
SBR Windshield:
Velocity: 2,328 fps
Penetration: 22" (approx.)
Retained weight: 60.9 gr
Max expansion: 0.426"
Min expansion: 0.246"
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