I have used the 270, 7mm-08 and 308 Trophy Copper, and all have performed very well.

On a cow elk hunt two years ago, I used the 7mm-08, and she went right down. It was a pass through so I don’t have the bullet, but the exit wound was significant.

The Trophy Copper is a Nosler ETip that Federal and Federal adds relief grooves.

I still don’t know why Nosler won’t do this, but the Federal rounds shoot better in all my rifles versus the ETips.
Good hunting