the data is all over out there, ya just gotta dig for it a little bit,
But a thing you need to consider in your comparison, is that game 200 years ago wasn't "conditioned" to the human element as they are today. Being used to human inside 100 with a bow they where safe and they knew it,, then came along a musket,,
As is today the gun isn't/wasn't as devistating just because it's a gun. Alot had to do with the person shooting it and his skill as a marksmen and familularity with the game.
I've read Henry Row Schoolcratf's jornals, because they traveled very near my home, in the 1832 trip, they stopped one morning to hunt Buffalo and Elk,, the white men in the party took several shot's with no success, they gave the muskets to their native escorts and in 2 hours had 2 Buff, and 1 Elk.
Then there's always the Shot at Adobe Walls;
"The second day after the initial attack, fifteen warriors rode out on a bluff nearly a mile away to survey the situation. Some reports indicate they were taunting the Adobe Walls defenders but, at the distance involved, it seems unlikely. At the behest of one of the hunters, Billy Dixon, already renowned as a crack shot, took aim with a 'Big Fifty' Sharps (it was either a .50-70 or -90, probably the latter) he'd borrowed from Hanrahan, and cleanly dropped a warrior from atop his horse. This apparently so discouraged the Indians they decamped and gave up the fight. Two weeks later a team of US Army surveyors, under the command of Nelson A. Miles, measured the distance of the shot: 1,538 yards, or nine-tenths of a mile. For the rest of his life, Billy Dixon never claimed the shot was anything other than a lucky one; his memoirs do not devote even a full paragraph to 'the shot'.[1]""