What about the Barnes tsx bullets? Like the 95 or 110, they shouldn't blow up, and the reason some guys have commented on why they don't like them on deer, on other boards, is because they don't leave a very big exit hole to leave a blood trail. I've not tried these on yotes yet, but I plan to this winter. Since they stay together they should leave whatever the expansion size is as a hole. Like 1/2"-3/4" or so. Does anybody have any actual data? I'm just going on the idea that these tsx leave upwards of 99% of their weight when recovered. They are more money maybe, but if you put up hides, it seems like that's what you require to get more money for better hides, and less damaged ones.
ETA: over on 68forums a guy by name of Xman has done a lot of bullet tests and they will be helpful to you. Its a sticky under the reloading section I think. He says the 110 opens better at lower velocities because it's the mass of the bullet that helps open it up, not just the velocity. Also a faster twist is helpful he has found out too.