Last month we dinged the factory prop...the original OJ 13X15.5. The local dealer recommended an OJ 14.25 X 14. Yesterday we finally had the full 3000# of ballast in all the sacks for the first time (2005 24SSV 325 Indmar). With the old prop this amount felt sluggish, and surfing was about 3500rpm. With the new prop the weight is no longer noticeable, and the RPM at surf speed is just 3000RPM. After we emptied the sacks I wanted to see what the top end is...just over 40mph. So, this newer model OJ is much more usable at surf weights, and only took about 5mph out of the top end.