450 fps is the velocity for a no. 8, or 7 1/2 at what distance, when launched at 1250 fps?
And, was that air pistol firing no. 7 1/2, or no. 8, shot? Or was it firing steel BB's?
Stan
Stan, good question. It was firing various larger sizes of lead shot so as to generate energies typical of smaller shot as used on clay targets. Data showed that the target was broken by impact energy via shock propagation within the brittle material, not by pellet diameter aspenetrationofthe clay was unusual. The shock wave would result in fractures at discontinuities and/or the side opposite the impact. The rotational force actually pulled the pieces apart. No steel BB's. A cleaning wad was used as the barrel sealer. The next logical step in this line of experimentation is to use an air rifle, perhaps a pump-up version than can achieve various velocities.
