I see. I was referring to the nominal speed of sound and was thinking of the wave of a laser beam in a vacuum with an index of refraction of 1. My error. What is the max velocity that the expanding gas accelerates the shot charge down the tubes? Well, at the barrel/outside interface does the shot charge have the greatest velocity? I am interested as to how the speed of the whole lot of wad(possibly a little powder) & shot makes the transition from below the speed of sound to a velocity greater than the speed of sound. Doesn't the group velocity of the shotstring travel near or above 345 meters per second, or am I mistaken? Thanks for taking the time to educate me.

JOe: I quizzed Mr. Highsmith about the Brits Damascus & the impact of the Moor's influence on barrel types. His response was that I need to forgot researching such an unpopular & worthless topic and research something worth while like the Limey's Whitworth steel. And much like Jackie Gleason's response to a "germane to the situation", Mr. Highsmith said that the Moors were G**D*** Rednecks and don't bring them up again.

Kind Regards,

Raimey
rse

Last edited by ellenbr; 10/23/07 06:08 PM.