Scott: When I shoot light loads in the tens it is with 12 Ga. factory shells and Gauge Mates. The patterns are always very tight. Even the 1 7/8 oz 12 Loads shoot tight in the tens.
I have 327 Alcan 10 Ga. Brass cases that are dedicated to this short NID Ten. I started loading and shooting these shells back in the late 1950s. (Old habits die hard) When I want very tight patterns I will cut the shot cup off from a Sami one or BPD wad and place it on top ot the last fiber wad in the load and fill with buffer and shot. I shot them all empty last spring on the Crows. As I get older I may now need a bigger pattern in order to hit things. HA HA. When "old blackie" folds up with multiple hits at long range it tickles my funny bone. So Scott you keep up the good work with those ten ga. shotguns. Good Luck