I don't really think you should consistantly try to rely upon any of the ballistic tips to do so, IMO you should try some sort of bonded or other premium bullet such as the Nosler Partition or the Trophy Bonded Bear Claws, X bullet, etc., that is if you are going to be deliberately trying to blow out both shoulders every time.

I am curious though as to why you chose a .270 Wthby (whose entire marketing guise is based upon speed and distance) for shots of less than 200 yards when you could get the job done just as well with many less punishing cartridges.

Don't take that the wrong way, if you wanted a .270 Weatherby Magnum, by all means use it happily, I'm just curious.