A berger 105 at 3250+ has the same energy or more as a 270 w/130gr and shoots flatter, cheats wind, etc at distance. Has less recoil and uses less powder as well. For an all around gun, the 7mm would have to be it, but the 6mm will handle everything from prairie dogs to large deer(and yes an elk has fallen to it as well), and the 338 can handle everything. Having shot deer and antelope out to 1k with the 6mm, I know what it is capable of. If you could only have one, it would be a 7mm for sure. Sorry for getting things off track.