https://www.globalsecurity.org/military/library/policy/army/fm/3-22-9/c02.htm M855 drop during 25-meter zeroing (trajectory) of M16A2 and M4

FIELD MANUAL

HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, DC, 24 APRIL 2003

FM 3-22.9 RIFLE MARKSMANSHIP M16A1, M16A2/3, M16A4 and M4 CARBINE

CHAPTER 2 CHARACTERISTICS, AMMUNITION, AND ACCESSORIES 2-11. AMMUNITION TYPES AND CHARACTERISTICS

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