I've only killed two deer with the 270. Two does at 130 yards with Barnes TSX 130's. The first was hit double lung and hit the floor fast. The second turned quartering to and I shot anyway. Bullet broke the onside shoulder, turned up and ran the length of the backstrap, angled down the thigh and broke the femur, which is where the bullet stopped. I found it upon butchering. That deer was a mess. It dropped like it was hit by lightning. It's nice not to have to track a deer, but I lost 40% of the meat due to the sheer violence of the bullet. That doe was massive and the amount of penetration and destruction was impressive. I don't doubt the power of the 270 or the Barnes bullet. I think you could kill darn near anything that walks with it.
