Nomercy...you make valid points. I too cannot see how two almost identical cases and nearly identical bullets, .007" difference, couldn't not have similar ballistics regardless of barrel length. Those of us that have been around firearms long enough know this. Its threads like this that fills the novice with inaccurate information making them dumber for reading it!
There was some good history on the 2 chamberingings but the other stuff is jibberish as far as I'm concerned.