I started out hunting deer and elk with a .270 because that's what my brothers and dad used.After having a bad experience with a quartering away shot on a cow elkat about 100 yards, I switched to the .300. That and I just wanted one.

Of course, now the disclaimer. A .270 shooting a good bullet, the right placement and a reasonable range will kill any elk on earth. If you can shoot the .270 well, I would say use that. Especially if you haven't shot a .300 before. The difference in recoil is not insignificant.

I currently shoot the .300 with hand loaded Nosler Partitions. My rifle likes the combination and if I do my job, it is very accurate.