Boomer, I have shot an elk with the 140 AB out of the 270WSM, but today, I load the 150 PT's in mine, 65.5 grains of RL22, CCI250 in a WW case, with a 2.860 COAL. Runs out of my rifle a little over 3100. It is my absolute favorite rifle, hands down. It just gets it done. I am using the 150 PT Golds this Fall for it, but they shoot identical to the 150 PTs.
300 yards
100 yards
PT Golds
Regular 150's
Either one of the bullets would be excellent for cow or bull elk. I took my biggest bull to date with the 140 AB, but I tend to like the PT a little more in the 270WSM when tackling elk. Give the load a try, it works too well for me, over and over to not be a decent load in your rifle with a little tweaking. Good luck.