Quote:
Originally Posted by screamingmorris 
I'm not obsessed with the bore size of the Conn 5A.
I am just recognizing that the conbination of .485-bore cornet with fairly deep mouthpiece is temporarily not giving me the control I used to have with a .460 cornet.
With much practice and concentration I will eventually gain control over it and then I will be "master of my domain".
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What I was saying was that the difference in bore size compared to all the other differences on the two horns isn't likely to be what is affecting your playing.
I have many horns, and I couldn't tell you what any of the bore sizes are. Bore is only one tiny slice of the trumpet-playability-pie.