I have both plus a 338.
The 338 has just been safe ballast, so no experience on game.


Here's the thing,

You can get very similar trajectories from both.
The 300 will probably hit a bit harder.
But, the 7mm will hit plenty hard enough.

The 300 will hit you much harder.


Oversimplifying?

If you look at it critically, considering that once you get to the point you need to
correct for drop...

Well,
Now the 30-06, 280, 270....

start to crowd in. Cheaper, easier to get(usually), less recoil.


Parents who say they have good kids..Usually don't!