I did a cull once and used a .270 and .30/06 side by side on many dozens of animals using a range of factory and handloads for each.
In the end I found the .30/06 had the higher percentage of instant drops between the 2 cartridge but the surprise for me was that it didn't matter weather I was using pip squeek factory loads shooting 2-300fps under hand loads, the results were still favoring the .30/06.

I put this down to a caliber difference and wound size being the distinguishing factor.

This simply means I don't care what the bullet and load is, if I have a .30/06 in my hand, I have already been impressed.

When truth is ignored, it does not change an untruth from remaining a lie.