Thread: recoil question
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Old July 1, 2013, 03:48 PM   #7
BigD_in_FL
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Join Date: December 20, 2012
Location: The "Gunshine State"
Posts: 1,981
Here ya go:

If one knows the average velocity of the escaping propellant, the free recoil velocity (in a vacuum) is simply:

V = ( b*v + c*p ) / W

where b is the bullet's weight, v the muzzle velocity, c the charge weight, p the average velocity of the escaping propellant gases, and W is the rifle's weight.
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