Certainly not trying to be contentious, with anyone. It just bugs me when I can't seem to be answer this. I must assume, for the choke to work at all, that upon setback the petals no longer contain the shot payload and it widens to bore size as it enters the "oversized" bore. Physics would suggest such. Certainly it cannot remain .410 bore size as it travels toward the muzzle. If that does occur, how does it exit the muzzle ....... in an orderly state with the wad behind the shot, or does it exit the muzzle with shot all around the shot cup? It is all just totally outside my realm of understanding how a device like this can deliver any semblance of consistency in patterns and performance.
