I just bought a crap ton of 180 grain .40 S&W, so please... say it aint so !
He is talking about
Constant reworking of the brass by reloaders
So have no fear. That said there were several factual errors on the site already addressed.
That short barrel that CDW4ME is talking about on the 27 won't offer the same velocity as a full size model.
The glock myth comes up quite a lot:
Hand loaded ammo is most often the cause of KB, in all kinds of firearms.