The bit about the game being alerted by the cartrdige clink when it hits a rock is quite valid. It was of more signiifcance to the commercial hunter who might wish to take several animals from a herd.

A second point is that ejectors add complication and reduce reliabilty. A dangerous game rifle must be reliable above all else. One of the justifications for the expense of two barrels and two triggers.

Third point, when I saw a guy with a double get off four aimed shots faster than a guy with a magazine rifle he did not have ejectors. In fact I think given the technique used, ejectors would have slowed him down due to stiffer opening or closing.

Forth point, in a charge, you get two shots period. If there is to be a third shot it will come from your backup man.