Yes chuck375, I have seen the exact same results but even out past 500 yards and sometimes way past. I no longer shoot at any game that far, but I did at one time and I used a 270 for almost all of those long shots.
And like you, I never lost one, and in every case but one I never fired 2 shots. The longest range elk kill I ever made was with a 270 and I did shoot 2 times then, but I found when I was gutting the elk the 2nd one was not needed.
I am a gun-buff and I use a lot of different rifles for my hunting because I find the hunt more fun then the kill. To be honest, I have not taken out a 270 in about 9 years now, just because it's become too easy. But with that said I believe it does illustrate the point very well.
270s work and they do the job very well.
Like many other rifles the choice of bullet is important, but if you use a bullet that holds together you need not worry about how well a 270 is going to work for you for most game to most ranges and that does include elk and moose. In fact there is a large bull buffalo in the Jake Corel Museum in Riverton that I saw Jake himself kill. One shot with a 270 Winchester and the bull dropped on the spot with a hit in the neck.

Guns and cartridges seem to take on a religious meaning with many who are a bit foolish. Like any religious fanatic, the devotees of XYZ round are 100% convinced to it's superiority over all others and that makes them the gurus of the ballistic world in their own minds. They KNOW they are right and everyone who disagrees is wrong ---- and there is no give in their mindset. (Like Democrats and socialists)
So just like Dem/Comms they will insult everyone else who would dare to speak another view point, or relay past experiences that may disprove their belief in the supreme power of their "god".

They are actually just fools. Not because of what they like, but because they want to disallow other views or feel that other people failing to warship their "god" is disparaging to them persoanlly

The real truth is tactfully simple.

Bullet holes kill.

Not bullets, not brass powder bottles we call "shells", not B.C. numbers, velocity, scopes, rifling twists, powders, harmonics stock materials, or anything else. Heck, I have some pieces of a bullet in me right now as I write this, It didn't kill me. The hole was not in the right place to do that.

Use ANY cartridge with a bullet that will make a large enough diameter hole, that goes fairly straight once it hits meat, and exits the other side----- and all the science becomes 2nd rate information. Archers kill game all the time with sharp sticks.

Is a 270 a great round? Yes!
It is "greater" than the one you may like?
No.
Is it worse?
Again no!

The round is 2%
The hunter is 98%.

As long as we don't get stupid (which comes from that religious "Democrat-like arrogance" I wrote about above) it doesn't matter much what you shoot, as long as it penetrate well enough to go clear through, and as long as you can shoot it well enough to hit your game where it needs to be hit.