I had what I think was a Coleman made Dwight Schuh hunting pack in the early 80s. I was hunting in northern Idaho at the time, and because of how brushy it is there, I really liked the fleece bags and the low profile (the top sat just below my shoulders).
My friend found its limit when I lent it to him on a day we packed out a bull in one trip. The frame bowed so much under about 135 pounds of boned out meat that it looked like a C from the side. We had to tie some pretty stout pieces of wood to the sides as reinforcement.