Well no......
a 30-06 with a 165 is about the same at 300 yds as a 30-30 with a 170 grain is at the muzzle. (not at 150 yds)
So that's a 450 yd difference between the 300 Weatherby and the 30-30

A 30-30 will shoot a 110 grain bullet at 2600 FPS so it's the same at 100 yds as 30 carbine is at the muzzle.

So that's an additional 100 yds, bringing us to 550 yds, ----- and with 55 grains less bullet.

A 30 carbine will shoot a 110 grain bullet at 2100 FPS and so it's the same velocity at 200 yds as a 30 Mauser is at the muzzle, but with 30 grains more bullet weight on the Carbine bullet.
So now we have a comparison of the Weatherby shell and the 30 Mauser shell being about the same velocity at 750 yds and with less then half the bullet weight on the side of the Mauser shell.....

Look at any good set of ballistic tables and you'll find these figures to be pretty close.

It's a compairison, ----------- but I fail to see what the point is.

Will a 30 Mauser kill a deer if hit through the lungs with an 80 grain soft point?
Absolutely! As long as it goes clear through the vitals, so obviously it's not going to do that from extreme long range, but at any range it hit a deer AND expanded, AND went through both lungs, I'd guess that we'd have about a 99% chance of killing the deer.

In fact, so will a 22 LR. I know men in California and Idaho that have done it literally hundreds of times. We killed probably 500 cattle with a 22 when i worked at a slaughter house in nevada when I was a kid. So what? It doesn't make a 22 a good buffalo gun. Those kills were not done in a HUNT! The cattle didn't have any way to aviod the shot, and the shooter got to pick the range (about 8 inches) and the angle of the shot.

I have killed an elk with a thin wood stick with a blade of only 1 1/4" width on the end, (called an arrow) and so have hundreds of elk hunters in Wyoming every year.
An arrow launched off a 100 pound compound bow has less energy then a 22 long rifle with a 40 grain solid.

A 380 ACP fired from a 2" barrel shoots FAR flatter then any arrow shot from any hunting bow too.

So again........ is there a real point here ????