Effect of Environmental Temperature on Bullet Velocity

Environmental temperature can significantly effect the velocity of a bullet. In tests conducted by the military using M-16 rifles, two rifles, having a rifling twist of 1:12, lost 167 ft/sec and 109 ft/sec, respectively, in muzzle velocity when the environmental temperature was decreased from 70°F to 0°F.29 Table 10.3 shows the results of the experiment with the two rifles at different temperatures.

Table 10.3 Effect of Temperature on Bullet Velocity (weapons used, M-16 rifles)

Temperature

(°F)

Weapon 1

Weapon 2

Muzzle Velocity (ft/sec)

Muzzle Velocity (ft/sec)

-65

2983

3031

-30

3011

3078

0

3039

3144

70

3206

3253

125

3219

3281

0 0

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