Hey, I'm a college trumpet player and was wondering if anyone can help me with a strange range phenomenon. I have had range up to an E for about 6 years now. However there is a barrier that I cannot seem to cross at F. I gain more and more consistency and endurance up high every year but gain zero range. I play in a R&B/Blues band and am to the point that I have cutting Es with a good full tone at the end of an hour long set without struggling or forcing. However, Fs are still virtually non-existant. Can anyone explain why the very peak of my range is now usable, but my range hasn't increased for years? I've had people tell me it might be my horn, but I doubt that's the problem. Other players have no trouble with Fs and above on my setup. Thanks for any feedback!