Originally Posted By: eightbore
If you added ten grains of sand to your 15 grains of powder, would it increase the recoil as much as your equation suggests? I don't think I am the only reader who is doubting the the correctless of the equation.


No, just as 10 grains more lead shot has less effect. The key is the assumption that X grains of powder, any powder, is converted to X grains of gas. And that gas, unlike the lead shot or sand, accelerates to 2-3 times the speed of the shot the instant the blockage (projectile) clears the muzzle. That sudden back thrust of gas adds more to the recoil than an equal mass of sand would. A muzzle brake redirects that gas thrust to pull the gun off your shoulder, thus reducing recoil.....as I understand it. crazy