What is long range considered in your question? Past 400? Out to 400 all the standard cartridges like .30-06 still do swell. If you're interested in true long range hunting, like the past 500 yards and further stuff, a whole different set of equipment comes into its own. If that's your game, shoot the biggest rifle you can, as even heavy magnums arrive at long range looking very anemic. Shot placement is also wishy washy at long range as game can move before the bullet arrives, and that's leaving out wind, and the plain straight difficulty of a 500 yard plus field shot and first shot hit. The more horsepower the better in that case. Inside 400 it's very low drama and straightforward, and is more about the optics and shooter than the rifle.