Seems to me a guy should order the length they want and Bartlein adds 1" to that for the smith to work with. I'd make sure to clarify with your vendor or bartlein when ordering.
I bought a blank off bugholes listed as 26" and I assume it was 27" with 1" extra for the smith to cutoff. I would think something like this
http://www.bugholes.com/product-p/cx-30cal-10tw-ss-cfw-n4-22.htm listed at 22" but will actually measure longer is what
@CApighunter wants. The desired finish length is the important #.
The other goofy thing is how bugholes says what the muzzle diameter is at the finish length. It conflicts with bartlein saying the contours are the same as the steel barrels. A #4 contour @ 22" shouldn't have the same muzzle diameter as a #4 @26 if it's the same contour as the steel barrels. Basically they are indicating contour changes based upon spec'd length.
My 300wm havak with a new 26" #4 bart carbon just got back from TS Customs today. I'm excited to give her a whirl!