The Warburton trumpet I use is the 334 in Large Bore (.464) and the Warburton mouthpiece I use is my own model “L. Aquino” with a BQ backbore. For “Legit” music I use a Warburton 6M cup with a 7* backbore.
With this equipment, I can get the sound I need for the music I have to perform at any moment. I just switch between Warburton mouthpieces and I’m good to go.