You guys Crack me up.
I'm sure at what ever range your flinging bullets at you will not squeeze the trigger if there's a chance you'll miss.
It is pretty funny at times, and while I'll never argue a 7mm bullet isn't better on paper than a .277. That said my largest mule deer should have never crumpled at 560 yards to a .436 BC Sierra GK according to some. In the real world of hunting there is no real difference between 7mm and .277 bullets as long as the shooter knows how to shoot his chosen rifle and cartridge.
However, the OP knows what cartridge he wants to shoot and is just trying to determine platforms that'll reach his goals. I can't argue against his choice the 7mm RM as it has proven itself time and time again in the field. Now I have my doubts about me ever wanting a 7.5 lbs all up rifle launching 180 grain bullets at 2800+ fps. It just doesn't sound like fun to me, I have a 7 lbs 06 and 165's at nearly 3K gets old quick at the range.
