It has everything to do with the line of the bore not passing through the gun's center of mass. The tangential recoil force will cause the gun to torque around its center of mass. A gun is essentially a pinwheel.
Interesting hypothesis...NASA must be wrong then in having tangential jets for rotating space capsules!I read the wikipedia page about 2 seconds after I posted this, but thanks for the answers.
I think it's more based on the contact points, because the gun isn't pivoting around itself, it's pivoting around where you hold it.
The main reason I asked is because for some reason I thought it had to do with the hot gasses trying to escape up, and I wondered how that would apply to a gauss rifle or rail gun. Apparently it has nothing to do with that, though.
Would it then be called muzzle left?Here's the cure for muzzle rise:
Recoil and recoil.Recoil, and to some extent, muzzle gas acting like a tiny rocket motor...