I am 15 and I have recently went through a full embouchure change about 4 months ago. My range is so much better, (double F), but there is one really big issue I'm having trouble with, and that is VOLUME. Fully utilizing a Stevens embouchure, I can put all the air in the world through my trumpet, yet I can't get above mezzo forte. In fact, I once put so much air through the instrument (which gave me about mezzo forte, maybe forte) that my lips just blew out and I couldn't play for a few days. Unless I am truly missing something, it's definately NOT an air problem. My mouthpiece size is an Bach 8 1/2 C. This problem I am having now put me on 4th trumpet in the jazz band, when I know I could easily be playing 1st if I had the volume I needed! Comments, suggestions? So far, some have suggested me a Schilke 18 and 15. Do you think those may solve the problem?