I have run a best of 91.1 on gps with a nonlabbed 28 Hydro pulling 5400rpm. I talkedto Brett at BBlades and he wanted me to fo with a labbed 28 B1 on my 280. Boat will handle better with the B1 but will lose some mph with it. from my experience and alot of others, the Hydromotive will be the faster prop on a Velocity. You wouldn't be interested in selling that B1 by chance would ya? I have a new 30 hydro to sell/trade if you are needing more prop?