Although a small sample, when caught off guard and ammo-less (What didn't I remember from Marine Corps training, "I can never have too much ammo!") by an approaching flight of Buffies my Steel Shooting Parker friend handed me a half dozen of his steel shot shells. I used them with Gauge Mates in my Parker EH 10 with the only bad results being suffered by the ducks. Parker chokes and bores are still A'okay!
PS: A 10 gauge has 9% more area than does a 12 gauge. The pressure drop should correspond. Accurate pressure testing of course should be done before trying this at home...
