First off I've never killed a "big" Elk. But I have killed several, with a .270 and 130 gr. core lokts. All hit in the chest, broad side. About half were cows and the others were anything from spikes to 4x4's. I recovered a little over half of the bullets in the skin on the opposite side from where they were hit. The bullets looked like a little German Army Helmet. Like I said, I never killed a big Elk with a 130 gr. Core-lokt so your assement is no doubt accurate. All of the Elk I killed were in open country in either Montana or Colorado and all were killed somewhere between 175 yards and 275 yards. I never did kill one up close where that 130 gr. core-lokt was really moving. I have no idea how it would have performed in those circumstances.Shoot a big elk with a core-lokt, and you better have your hiking boots on, and your best local tracker with you
I don’t think that little 130 gr. bullet at over 3100 FPS works too good at 100 yards on a big animal. Especially if big bones get in the way before the bullet has a chance to get into the chest.