Funny, I own a .270W that came factory with the right twist. I own factory loaded ammo with the correct bullet too.
I can handload even better factory made bullets into brass which is easily obtainable.
But then, I also have a Leupold MKIV LR/T scope that works as intended. Guess I just got lucky.
What do you want to bet this clown owns just another incorrectly twisted 1:10" .270win and is talking out of his ass?