OK, so I am looking to get my first hunting rifle for mainly just our local socal mountains. I want something jack of all trades type, I would like to be able to hunt deer, Elk, bear, boar and the occasional coyote. I basically want one gun that will do them all even if its a bit 'over kill'. I have narrowed it down to 30-06, 7mm and 270. I have shot guns in the past but havent done much rifle shooting. Any suggestions on calibers? positives and negatives of each? I am assuming being that i new i would want a round with a flatter trajectory, correct? any suggestions would help as im planning to purchase soon.