Hi,
I did a jug choke for a customer on a Thompson Center New Englander 20 ga.
The choke was .025 X 2". The result was amazing.
#6 shot at 45 yds, gave 20 pellets in a 6" circle.
Load was 80 grains 2F 1/8" cardboard wad. 1/8" felt wad soaked with bees wax & olive oil, plastic shot cup wad with 1 1/8 oz. lead shot, and card wad over shot.
I tried it several times and the least count was 20 pellets on a 6" circle.
Needless to say the owner was some pleased.
He even dropped off a fine turkey the following Saturday.
Fred