Nicely put Bob. When discussing Taylor's KO formula we should keep in mind his take on it. It purely represented his field experience on the knock out effect of bullets to elephant with head shots that missed the brain. Obviously any cartridge that got its bullet into the brain easily killed an elephant but Taylor was more interested in the safety factor of the stun effect of a shot close to the brain and the heavier and greater diameter the bullet the better this stun effect was in his experience.

He did not even think it relevant to reveal how he derived his formula as again it was just a reflection and some way of quantifying the stun effect of big bullets learned from his field experience, and vast that was.

To try and relate that to any other formula or to try and relate it to shooting other game never was Taylor's intention and it is pointless for us to do that today.
While many of us accept his KO formula for what it was and is, some seem to deride it as irrelevant. I guess if anyone today has had the experience Taylor had and shot as many animals as he did without accompanying PHs and modern equipment, then if they say his formula was B...S I suppose I would have to believe them. Anyone for starters?