Just stating the obvious, but it seems nobody else said it yet: You are limiting it too much. Using a soft clipper only makes it distorted and you may get louder percieved loudness, but when looking at the peaks, it really doesn't get louder than -0dBFS that you can get without hitting the limiter. But I'm a oddbird in the forum anyways because I would rather listen to a dynamic mastering instead of brickwalled (metallica mastering comparison: black album vs death magnetic). You have seen this already, haven't you?
http://www.youtube.com/watch?v=3Gmex_4hreQ
Fucking plus 1.
Seriously, I don't get the fascination with supreme loudness either.
What, do people listen to their 90s albums and think "OH FUCK, NOT LOUD ENOUGH, I HAVE TO THROW IT OUT BECAUSE IT DOESN'T COMPETE WITH THE SHEER LOUNDESS OF DEATH MAGNETIC!".
Have people stopped buying Master of Puppets because it isn't loud enough?
Of course not, people just buy it because it's quality music.
If there is one thing that has disappointed me a little about this forum, is that people seem to be mastering their shit really loud.
It just doesn't make sense, because given this is a metal based place, you'd think metal listeners listen more deeply to their stuff (on average, compared to the average person who isn't into music as such) and would go for the quality of the music over how fucking loud it is).
I'd love to see this place really start to reverse that trend. Listen to some of those classic 90 albums, they were still fairly loud, but no clipping or pumping or any of that shit that comes with mastering/limiting too hard.