My boat with trs and 525s run 5200rpm with 25 mirages any body think i can get a little more speed out of her?

I had a 1992 Formula 336 with slightly built 502/hp500s. I tried every prop the local mercruiser guy had. The 25 Mirage plus was the fastest at 72.4 mph at 5250 rpm. I lost a little top speed with hydro or bravo four blades, but gained mid range. That was about six years ago, so some of the newer props may be better. Good luck.