I saw two patterns of Remington 2 3/4" 000 buck shot at 40 steps shot through two different chokes offered by Sumtoy chokes in the invector thread using a Winchester 1300 gun and in both cases all 8 pellets are inside a 14" circle and that includes the flyer in each shot.Most were inside a 10" circle believe it or not. This was through a Buck Wild and LM choke. In either pattern there were at least three pellets within an inch of each other.
These chokes are doing their best in the Winchester gray box 00 buck loads and yet they even work great in the Remington shells. Not the copper plated pellets, just the plain old lead loads. Ain't no tellin' what the copper plated pellets will do.
This Sumtoy choke just does an outstanding job for the guy who shoots buckshot ,especially while stalk hunting . These may actually be too tight for dog hunting on running deer but I have never seen anything like them for tight buckshot patterns. A chest shot at 40 yards should take out lungs, heart and liver possibly. You don't get far with that shot.