Thread: New rifle, scope question

Originally Posted by gadgetman

The powder/primer charge gives the energy to the projectile according to 1/2mv². From this, very roughly, we get the velocity of the projectile. Then as the projectile leaves us on it's little journey the momentum, mass * velocity (mv), comes into play which imparts the velocity and energy back into the firearm, with roughly the same momentum. This energy is dissipated into the firearm and shooters shoulder. There are other things in play but these are the main bits.

No I was asking Tim, based on his previous reasoning that I quoted.