I have been playing trumpet since 1973 and have a question. I have heard that smaller bore trumpets make it easier to play higher notes, but at what point or bore size does this rule not hold true. Also, I would think the sound would get thin and the low notes would greatly suffer. I currently play with a .462 and a .459 bore and thought of moving to a .455 or smaller bore. I have noticed my lip get's worn out sooner playing on my smaller bore than on the larger bore. Are there trumpets that are small bore than are more free blowing and I would not tire as fast? I currently play with a GR Chuck mancuso 65.5S Mouthpiece which I absolutely Love and recommend for high/low notes and a Big sound.