The 270win will certainly work for elk hunting in most situations as will the 260rem or even the 25-06.Many elk have been killed with all of these cartridges.However,I do prefer a larger cartridge for those times when the angles are not perfect or the ranges get longer.The 300wsm or 300win mag are excellent choices for elk however,I would limit my scope magnification to 3x9 or 3.5x10 in order to have a larger field of veiw at closer ranges..