This is from an old article on blackpowder shotgun shells:
Velocity. Shot velocity is about 1000-1300 feet per second; same as modern loads and the same as it has been for the last two hundred years. There is just no point in driving small shot much faster than the speed of sound because it will just slow right back down again. It's not called the 'sound barrier' for nothing.
Midway used to carry Goex Black Dawge factory loaded shells in 12ga at 1050fps, but those appear to be discontinued.
