Mine is strung at 27 lbs with BG66. I think it was a little bit more powerful when it was strung with BG85 at 25 lbs.
Mine was strung with BG85 at 25 lbs, very powerful. However it seems to loose tension quite fast, I may try BG85 at 28 lbs next time (I use this setting for my Mizuno MP300).
Ricky, I think you have a strong forearm that enables you to use such a high tension. I can't go so high and keep good control of the shuttle.