Читать книгу The Complete English Wing Shot онлайн

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He did this to discover the longitudinal spread of the shot pellets at various distances. If ever the chronograph could be used for taking differing shot velocities, this appears to be the way. But it has never been repeated, and some results appear to throw doubt upon their own accuracy. The various lengths of the shot spread on the targets moving at 200 f.s., at right angles with the line of fire, were as follows upon the top lines. On the bottom lines in the table the shot pattern spread, caused by the 200 feet per second, is multiplied by the ratio of greater speed of shot than the 200 foot-seconds of the revolving target. So that in the following table the bottom lines, in respect of each gun, represent something near the true length of shot column at each distance. The speeds taken in the foregoing table can be gathered from the Griffith figures on the next page. But if, for the 30 yards range, the truer mean speed of the shot column is wanted, this is equal to the striking velocity of the most forward pellets and the velocity of the rear of the column added together, and divided by two. For this calculation there is a slight inaccuracy originating in the following tables, because the striking velocity of the rear pellets has been taken at the full range, instead of at the length of the shot column less than the full range. This position can only be found by trial and error. It will vary the results by a yard or two. Inches have been disregarded in the tables.