George, your friends 270/150 Partition experience sounds about right. I will say, my friend Dober says he has seen more 270/150 Partitions sail through elk than most any other bullet.
I'm a heavy bullet man at heart and have only taken two elk with the 270. One a heavy, mature 10.5 year old 6pt with the 150 Partition. In that case, I shot the bull as it was feeding, head down, facing me at 40 yards (I'd crept up to him and he was unaware I was there). One shot into the spine that traveled down through his vitals and was lost somewhere in the paunch.
The other, a fairly heavy, older cow with the 150 Ballistic Tip. Like Joe, I shot her broadside at 130 yards. Bullet punched the ribs/lungs and exited the offside. She tumbled down the hill, right to the road. I was able to back the truck in and slide her whole into the truck bed!
The bull was another story...
