With elements of bullet construction being equal, the 150 grain is obviously going to give a little more penetration than a comparable 130 grain. But in this era of super bullets, weight is really no longer all that critical for penetration. The 130 grain Barnes Triple Shock or 130 Swift A-Frame will shoot through a deer end-for-end. And 130 grain Nosler Partitions will shoot through both shoulders of a bull elk. Why not stay with the lighter bullets and enjoy the flatter trajectory - using different bullet constuction types for different game?

Having said that, here are my picks for .270 bullets - based on 35 years of experience:

Antelope: 130 Nosler Ballistic Tip, 130 Hornaday SST

Deer: 140 Nosler Ballistic Tip, 140 Sierra BT, 140 Hornady Interlock

Elk: 130 Swift Scirocco, 140 TBBC, 140 Nosler Accubond