RB - your last post on the plastic wad improved shooting was as I see it, except I think the plastic wads improve patterns mostly from holding the shot together out past the muzzle a bit longer than if there is no sideways guidance, more so than reduced deformations. Instead of punching into the base of the shot cloud, the curved, cupped and/or thicker plastic base sections are cupping the shot cloud at the base, increasing the denisity of the pattern, much like the 'old Sweidish cupped wad" did, that Greener talked in in "The Gun etc. 9th edition".