You can't work a Hering, or our props, like you can a Bravo 1, for a number of reasons. A stock Bravo 1 can be worked a lot. The diameter of the Hering is also going to have a great influence on what rpm it will run.
And yes, a 30 Bravo 1 is'nt going to be close to a Hering 30 6 blade rpm wise. An equivalent 6 blade, ours or Hering, is going to be about a 27.