If you guys look at actual balistic charts you will see the .270 is junk COMPARED to other calibers. I personally use a .270 and I know it's a good gun. 30-06 is NOT good to 200 yards. Lots of drop and not much energy retention that far out.

.243 is flat and fast yes, but others havemuch better knockdown power.

.300 WSM (winchester short mag) would be my choice although I believe the 7mm WSM is flatter and faster, just a smaller caliber bullet.

Check out the WSM calibers. The performance is unbelievable.