For those of you who shoot the 7mm Rem Mag, what would be the best bullet to use for both mule deer and elk? Is 150 grain big enough for elk or would I be better off using 165 grain? Is the 165 grain too big for mule deer? I guess my question is, what would be a good all-around bullet to use on both mule deer and elk or do need to use different bullets for each? I'd like to be able to sight in with one bullet and make life simpler.