My 2 cents:

Diameter on braids may be much smaller than equivalent LB test mono, however
diameter to equivalent diamter mono cast farther. In other words, 10/2
powerpro does NOT cast as far as 2LB mono.

I attribute this to first the surface of each line -- mono has to have less
friction than braid -- it smoother. Second, my guess is that diameter and
weight are 2 different matters. Braid is heaver for a given diameter than
mono (speculation on my part). Anyone want to weigh a spool of each and
report back?

-Steve