I shoot a couple of different cartridges and use them exactly the same as what you describe -
7mm STW
300 Weatherby Magnum
338 Ultra Mag
I target shooting with all three cartridges out to 1,200 yards, and I have killed bull elk with all 3 cartridges out to that same distance.
My normal elk hunting rig is a T/C Super 14" Contender in 308X444 Improved with most all shots being kept under 300 yards.
7mm STW
300 Weatherby Magnum
338 Ultra Mag
I target shooting with all three cartridges out to 1,200 yards, and I have killed bull elk with all 3 cartridges out to that same distance.
My normal elk hunting rig is a T/C Super 14" Contender in 308X444 Improved with most all shots being kept under 300 yards.