As I recall John Taylor AKA Pondora did not like ejectors. After I have killed my 1,000th elephant I will tell him he was wrong.
The "Booming" sound of firing a big bore is not as easy to locate in heavy cover as it echos around, as is the click of an ejector.

I have a copy of his book "African Rifles & Cartridges" but would have to pull it out & see for certain what all he said on the subject, but that I do recall from memory.

From actual experience on FAR smaller Beasts, I have seen squirrels not quit cutting hickory nuts and other masts when one was shot with a shotgun, yet a breaking of a small twig on the ground may well send them Scampering.

My experience in hunting Dangerous Game in thick cover is a Giant NIL, so can't really speak from experience there. I would put a lot of stock in what Taylor had to say though, even if he was a poacher.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra