This .270 cartridge was introduced by Winchester in 1925. Only the .30-06is more popular than the .270 Winchester among big game hunters, a state of affairs that does not take a genius to figure out. The .270 Winchester offers superb accuracy in good bolt action rifles, a flat trajectory, and good long range punch, all at a level of recoil tolerable by all but the most inexperienced shooters. The longest running debate among fans of the .270 is which bullet weight is best for shooting big game. Probably, those who advocate the 130 grain bullet for game up to the size of mule deer and the 150 grain bullet for bigger stuff have the stronger argument. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.