There was a thread on the TSS page with some good info experience with #2 TSS (I think) on coyotes. It might have been #5 TSS…..which would more than be enough to way long for a shotgun. If I’m shotgunning FOR coyotes, I’ve used everything from #4 lead to 00 buck, depending. I’ve killed them with tons of 12 & 20 turkey loads and even #8 20ga dove loads, when hunting other stuff. I’ve even given one a face full of bismuth #4s at 15 yards, which did kill him….but not right away. Bottom line? Lead #2s, BBs or #4 buck would be good places to start, and pick the one that patterned best.