Just checked the target file Sabotloader. All I've ever used before were regular CCIs and Remington Kleanbores. The first year I had this gun I was getting a dirtier breech and a little scorching on the bottom of the scope. Then I adjusted the breech block for a tighter lock-up and achieved zero blow back. I would have to change the adjustment to use Winchesters though. It's just not possible to close the breech on them.

I haven't given up on the Blackhorn. I have a little left and will try the 80 grain load again and use a target dot lower on the target. Might even break out the chronograph and see how fast it's going.