So why does it offer nothing over 6 or 6.5? I see a .330 G7 BC (with a BlackJack 131gr ACE) that can be run up to 2900 fps out of standard face, short action cartridges. I see higher barrel life and higher energy on target than 6mm's, I see that it'll outrun a 6.5 Creed anytime, anywhere, I see transonic at 1300 yards (at sea level). Overall, I think the 25 caliber is pretty high performance.
Now, if this was comparing other 25 cal bullets (110gr ELD-X, 115gr Berger Classic Hunter) to the 6 or 6.5, then I would tend to agree with you. They don't offer anything new.
If this was for hunting, dead is dead. Make a good shot, it doesn't kill anything deader than any other caliber.
But to say it offers nothing over the 6mm or 6.5mm is blatant trolling.