Jim's comment jarred me to better think thru the long shotshell column vs. the long shot column matter. Clearly, its not shotshell column length in-and-of-itself, its the increased shot deformation brought about by more shot-to-bore contact in a smaller bore vs. a larger bore, other factors being equal. That said, I'm pretty much where Jerry Lape puts the issue. Do we have any data here? Perhaps, too, 40 yards is too short a distance to make any notable difference. Perhaps 50 yards is better - - this yardage often put forward as being near max for a full choke 20 gauge shooting 1 1/8 ounces of shot. Is there a means of sharpening our understanding of this matter, based more on theoretical values, if empirical information does not come forward?
Regardless, its sure a good plug for hard, well-protected shot in smaller gauges when used for long range crossover type shooting.
