What about the Federal hulls. I have noticed our local Walmart has starting putting out a few Federal 16ga shells. I don't know if they are available as empties or if you just have to buy loaded ones to get the hulls. They have some in what is essentially the old 2-1 load @ about $8.00 a box. Would not recommend firing even these in a strictly "Black Powder" era gun or light 65mm chambered ones.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra