I think i will put my .02 cents worth here. i used to hunt only with a 270 , i still hunt with it but have other guns that need love also, and will say it is a whitetail killing round.
but i shot core lokts when i first got it cause i didnt reload . the only time it torked me was a buck ran into a thick young pine plantation and i had to drag the sucker out about 6o yards.
now i shoot the cheapest bullet around . the speer hot cor in 130 gr. why ? cause it groups outstanding in the gun and i have had great luck with it. never has a deer ran over 20 yards and most hit the ground !
i know it' s not the most expensive bullet but i have had great luck with it. now i will add i like neck shots and almost always take them. but thats a testiment to how the bullet groups and how i shoot it.
is the core lokt a bad bullet? i say no.

several have mentioned each deer is different and this is true. a deer has a drive to live and can run when it seems impossible to have ran.
example i shot a good buck with a 7mmstw the thing ran about a 75 yards . it had a hole in it' s chest the size of a grapefruit. you could see the lungs or what was left of them. he had a drive to live!

The 270 though is great caliber and i as long as i am alive will hunt with one.

I think that was a nickels worth?