King, I agree that the Kent TM stuff normally sold on this side of the pond is way too hot for vintage guns. Although the pressure is low on the 2 1/2" Kent stuff, they're no pussycats to shoot in a light game gun either. But then they're not target loads, and you likely won't be shooting a whole bunch of them in a day. (And if you do, it will get very expensive!)
Kent used to make 1 1/4 oz 16ga TM loads. I don't hunt ducks very often, but I did shoot a few of those in a light game gun (but modern: Bernardelli). Made some impressive kills, but they'd rattle my teeth in that gun.
