Wet fines and augers don't mix. Especially the Axeman style auger.
I would not bother with the AA agitator attachment, after this experience you WON"T fill the hopper with damp coal EVER AGAIN.
Enjoy your 'Motrin Morning'..
I think you could have got that buck to feed, with a little help from a long screw/rod like I have.
Do you have holes in the bottom of he oil drum to let water leak out??
A large piece of wood, like an index finger or a large flat piece of coal can block the entrance to the AA's auger, You can use a good flashlight and
look down the center of the auger and see that it's obstructed.
I have concrete blocks surrounding my coal shed, and I sometimes get flakes of concrete in my coal as I load my 5-gallon pails. I've had a piece about
1/2 the size of a pack of cigarettes block the auger. I used a piece of pipe to shatter the piece into smaller pieces and they fed to the top.