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Can you expect your gun to hold its zero in extreme temperatures?

from Shooting Sport USA

The temperature of the powder in ammunition at the moment of ignition has a significant effect on both chamber pressure and muzzle velocity. If a gun is fired in an environment radically hotter or colder than the one in which it was originally sighted-in, the muzzle velocity of the bullet can be significantly different. The difference in muzzle velocity changes the bullet's trajectory. But a shooter or handloader can use a ballistics program to explore a particular bullet's sensitivity to changes in muzzle velocity. more


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