I have several "tight barreled TC's I use BH in all of them, I have shot any one of them all day at the range and never had any problem that would indicate wiping or swabbing would be a good idea. I have tried swabbing and all my guns group tighter if you just shoot and cool a bit usually 3 minutes. I live in AR and the temperature is often over 90 when I am shooting which causes the barrel to hold heat longer.
As for the smoke I have noticed it, to it has nothing to do with the barrel temperature it is part of the residue of burnt powder. Lee