Yeah the FN P90 may produce high velocity shot, but the 32gr baby boolit results in only ~397 ft-lbf with the SS190 ammo (even less with civilian legal ammo).
That's not a lot of power when compared to 9mm (309-519 ft-lbf, depending on load), 40S&W (400-424 ft-lbf), .45ACP (352-518 ft-lbf), or...