Why no love for the King 607F/608F?

[blap73]

Given that I had my bore gauges out already...
Measured min leadpipe ID on a 607 as 0.382". Serial code 5 indicates 1996-2000 production.
Wondering how 'tight' that is, I checked the ending backbore on two Bach (small shank) mouthpieces, and found the end of the MP backbore on both is a bit smaller that the leadpipe ID.

Edit: total length from MP receiver to end of leadpipe is 9".

No idea if this is a tight leadpipe or not.