They just call the shot that keeps showing up... your stable shot thats left as "driven" the shots on target its flying like a car. those are all your drivers and how far do they go
They ought to invent a patterning board that moves across horizontally at the same rate of speed as a flying bird to see the actual stringing of the shot, not something you can't tell on a stationery pattern board. Does the superposed wasp nest - shot column do well on clays and live birds? I found most all my wasps nests are flame resistant and don't ignite and smolder unless it was sprayed with lots of wasp killer. Thought it might make good flint and steel tinder but not catch unless I dribbled black powder in the comb.
Flying away is aimed but a string is different. a duck can move you swing like that.
If you string the shot leaving the bore not all one ball it feeds out the bore a string.. some shot slower than other because of size..
howd it pattern.