The problem with these forum discussions is that there little to no discussion about the lack of safety of over kill, (read over penetration). Kill the game but no collateral damage.
Too may shooters just add power and bullett. Hell I stopped using my 6.5x55, it just penetrates too much and flies forever if there's a miss for my area.
The ballistic math is clear, unless there's a 70% or more chance that your only shots will be 300 yards or more no magnums are required. However I see 7MM Remington mags in the field for deer in Pennsylvania. 95% of the shots are way under 200 yards with most 100 or less. I know 2 guys using 30-378's. They get huge holes in an animal not realizing that they got no expansion, it's a large secondary wound channel and the bullet kept going, into the unknown!
Hunting a farmers field on a small farm may mean for safety a 30 30, 444 Marlin and limit the range of the shot. Actually stalk and hunt, close the range.
Clearly there are places where it's safe to use 6.5MM and larger magnum calibers but clearly there's even more where it's not safe. We don't talk about safety enough.
