Modern Masterpiece or Mediocre? .300 AAC Modern Arms 125gr Speer TNT

We fire .300 AAC Modern Arms 125gr Speer TNT from 8" 1:7" twist AR15.com AR15 upper into calibrated 10% ballistic gelatin to assess penetration, fragmentation/expansion, and retained weight as it relates to defensive use.

High Speed Camera Courtesy of Aimed Research
https://www.aimed-research.com..../high-speed-camera-r
[email protected]
724-877-5472

Penetration: 18.6+", 21.4" ( another shot was taken later )
Retained weight: 77.8gr
Max expansion: N/A
Min expansion: N/A
Neck: 4"
TSC: 6" x 3"

Velocities in fps:
1,939
1,936
1,970
1,930
1,921
Average: 1,939
StdDev: 18.54
Min: 1,921
Max: 1,970
Spread: 49

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