Hi guys
I loaded ,and shot a bag of #4's this last fall in my 1918 made Flues.I didn't have time to paper test it , so I can only report that it works very well on ducks, and seemed very shootable in the old double.
I also loaded about 15 of them with 2F GOEX black powder , and 1 1/8oz of this shot in Mag Tech brass shells ,with traditional wads, and they also brought the ducks down.
VERY fun.
Kip