Disclaimer: I have no first hand experience but have several friends who do have first hand experience whom I have had this conversation with.
Precision set about 1500lbs. Maybe a bit more at sea level on a cold day. Its a lot heavier than the 530F, and will pic a bit more at sea level but not at altitude. I know a few companies that work them, but none of them seem to work them very hard. A few hundred hours a year.
Either you love them or you hate them. Most 500 pilots seem to hate them because of the soft and slow to respond TR. The guys that like them seem to really like them.