Here goes, Doug… My Casey Junior pulled ten four-axle freightcars this afternoon. Eight of these were standard Bachmanns equipped with San Val metal wheels, and two were Aristocraft Ballast cars similarly equipped. My Casey is heavier than it came from stock. It carries an engineer figure weighing 4oz (115gr), and in the boiler a cast lead weight, sufficient to counterbalance the engineer and center the loco’s weight over the drive wheels. I have also added a small weight in the trailing truck of this engine. The overall weight of loco plus driver is 27oz (780gr). The engine looked as if it might have pulled one more, but I figured that was enough, and it looked absurd! See the pic. The yellow reefer just emerging from behind the plywood sheets at the back is the tenth car.
(http://freightsheds.largescalecentral.com/users/choochoo_chaboogie/_forumfiles/caseyjrtest.jpg)
Casey Jr pulling ten freightcars on the test track of the Littleton and Smallville Railroad in Toronto, Oct 6, 2012.