This expert-level analysis details the terminal ballistics of IMI's 77-grain OTM 5.56mm ammunition, often considered a clone of the Mark 262. Fired from a 10.5-inch barrel into ballistic gelatin, the ammunition demonstrated significant fragmentation and a substantial temporary stretch cavity, achieving an average velocity of 2367 FPS. The test highlights its performance characteristics, including deep penetration, while cautioning against its use if over-penetration is a primary concern.
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