Just a thought. "Karamojo Bell" ( Walter Dalrymple Maitland ) in the years just prior to & just after 1900.. Using a 6.5x54 MS with a 160gr RN bullet at barley 2250 fps took elephant & over 400 head of every size of African plains game. Averaging 1 1/2 shots per animal. That means a significant amount of the game was taken with one shot. Open sights , no scope. He knew his rifle & how to shoot it. This was before the 30-06 ( 1906 ) was around. Just a thought.