Just don't get them started on foot-pounds versus pound-feet.
Every deer I have shot with a 1oz sabot out of my 12 ga was knocked down off their feet.
Sounds more like a physiological response to the tissue damage, than being 'knocked down'.
Wait... 1oz sabot? Are you referring to a slug, saboted bullet, or the always improperly referenced anti-tank projectiles?
Or... the actual sabot hitting the target....?