I hauled two 100 bale stacks of alfalfa a couple days ago with my stack retriever. When I got to the destination, the retriever trailer had a hard time raising up to set the stack on the ground. I called the grower and asked him how heavy he baled the alfalfa. He said it was a little dry when he baled it so he set the tensioner at 375. I think those bales were the old school 16 bales to the ton. The buyer was happy that he got his money's worth. I did not want to throw those bales around by hand to lighten the front of the stack so I could raise the bed.