| If it "spins around", it is more likely that the mouthiece shank either doesn't have enough taper or is too long and is bottoming out. In either case it will 'seat' only on the very tip of the shank and this allows it to "spin". As I recall from my father-in-laws old Beuscher trumpet, those have a very narrow bore but a standard mouthpiece fit them fine. What you may have is a stretched out receiver.
You did not say what mouthpiece you have; I would take the instrument and the mouthpiece to a shop and have a service tech look at it and tell you what the "real problem" is and then make plans accordingly for either some instrument repair or mouthpiece selection (Warburton makes shanks designed for slightly oversized receivers...their "B" series shank). |