Mr. Starr jug choked my Dewson 10 bore. I used to carry my powder in individual containers inside my chest waders while duck hunting. Its tough to have to pick one booted foot up out of the water to have something to put the butt on while loading!
I was shooting 6 dr Fg and 2 oz copper plated 4's till the headaches began. Then I went down to more reasonable loads.