A 150 TTSX will do just fine. I took a cow elk last year with the factory Barnes load. 1st shot was ~100 yds complete pass through taking out the off-side shoulder. 2nd shot (kill shot) was straight through the sternum at about 50 yards. I recovered the bullet in one of the backstraps and it looked exactly as Barnes advertises. Don't have a scale to weigh it, but I'd wager it retained pretty much all of its weight less the plastic tip.
