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We shoot 5.56mm IMI 77gr OTM ammunition from an AR15.com AR15 with a 10.5″ 1:7″ twist barrel into Clearballistics ballistic gel to measure velocity, penetration, expansion/fragmentation, and retained weight.
Retained weight: 53.9gr
max expansion: 0.539″
Min expansion: 0.368″
Velocities in fps:
Temp: 82 °F
BP: 30.17 inHG
Altitude: 1,800 feet
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««« GUNS IN THIS VIDEO »»»
AR15.com AR15 with a 10.5″ 1:7″ twist
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