Re: 7mm Rem Mag
Southpa - you're having the 1-gun battery dilemma most everyone struggles with eventually. Lots of threads on this very topic.
I'm a lot like you, though a little more conservative in going long. Of course shot placement is everything, but it's also necessary to have enough hammer for the nail....
For distances out to ~800 for elk/deer/speed goats (anything except things that can bite back), I've pretty well decided on staying with 7mm. I have a Rem Mag currently, but am saving up pennies to have a 7mm/300 built for the extra margin of HP to that distance.
For longer than that and at elk sized game and bigger, I think a fast 338 is the right medicine. It's another rifle, but that distance/hunting is another game altogether.
However, these are just my thoughts/opinions and other folks have their experiences to guide them.
"I have a very strict gun control policy: if there’s a gun around, I want to be in control of it.”
— Clint Eastwood