Originally Posted By: Drew Hause
I still don't understand, even with pictures wink

Ed Lowry, ballistician and the director of research at Olin-Winchester, spark shadowgraphs. See "The Effect of a Shotstring" American Rifleman, November 1979.
The shells were likely the Winchester/Western Mark 5 with the polyethylene shot collar and fibre wads introduced 1961



Another images, the source of which I can't find. It appears to be 1 1/4 oz. Steel 5s = 304 pellets; possibly Kent Teal Steel at 1350 fps.

Cylinder at 30 yds looks like full at 50. The exact constriction is also unknown



I recall a discussion about coloring pellets; front, middle and back and taking images in flight as to change in location? Would probably need inside and outside also.


Thanks so much for posting the photos, Drew. Well done.

The shot column photos clearly show that the cyl (no choke) disperses quickly and the high choke effect full makes a longer, compact string. Obviously the no choke pellets have higher sideways velocity on average than do the high choke effect pellets.

Did I not say that at the same diameter (degree of bloom) patterns are practically the same? Look at the 30 yd cyl and the 50 yd full. Rayleigh strikes again!! ;-}

DDA