I actually have no experience with kills, using sabots. Now granted, they are accurate, and I believe an excellent hunting projectile. But I have a ton of experience with roundball and conical bullets. But to be fair, I have never take a shot over 80 yards. But I have used roundball and conical bullets to take a whole lot of deer. Now I never had the pleasure to hunt elk with a conical bullet but would have no fear doing so. Also I never hunted a hog although I killed of lot of them for butchering. But I intend to solve that issue this year.
All I can say is while speed is real important to many.. my shots here are close. And when I hit deer with soft lead, either roundball or conical... they go down. I have never shot a deer with a roundball or conical bullet that I could not recover.