Weightpull is a funny thing really. Obviously bandogs are stronger than pitbulls but they haven't pulled anywhere close to the weight pitbulls have. It's really just about the desire to do it, which is something mastiff influence is naturally going to diminish quite dramatically. I can tell you I'm very sure my bull arab would pull more weight than my bandog would have, not because he's stronger, I'm sure he's not, but he's more energetic and driven and intense. Holding onto the lead when he wants to go is way harder than it was with my bandog, but yeah again I'm sure my bandog was in fact physically a lot stronger. I dunno, hopefully you'll have some luck with your bandog in weightpulling, but there's a certain something in some dogs, an intensity that makes you think of a coiled spring, and I think this type of dog lends itself to weightpull, and it's really the antithesis of what mastiff type dogs are about. If they were like that I'm sure they'd easily dominate weightpull. This isn't really a criticism of mastiff type dogs, in fact I think it's very closely intertwined with what makes them so great.