The proof has existed for hundreds of years. "IF" the gun & load did not start to move simultaneously the gun would not move at all. The internal pressure pushes "All" directions at once. A gun is more or less simply an internal combustion engine which "Throws" it's piston out the end with every stroke. Long before Hatcher wrote the principal had been "Proved". He simply stated the facts & gave revolver sighting as an example. Since this is a dbl-gun board the bbl convergence of dbls is probably better proof. "IF" the gun did not move all doubles with converging bbls (do you know any which don't) would cross fire to the extent of their convergence.
I find it utterly amazing that winchester & H P White would come out with anything like this.
"For Every Action There is an Equal & Opposite Reaction". To the best of my knowledge this is still in effect.
