2007 Mastercraft X2 prop selection

I recently dinged the stock OJ prop on my boat. I have been weighting my boat up 1200-1500lbs lately plus people. I recently bought the Acme 847 prop and it seems like the boat is lacking torque and seems like it is spinning more rpm at 23 mph. Will going to the acme 977 give me more out of the hole performance and will I be spinning more or less RPM at 23 mph? I still can't believe that the stock OJ props are $700+. Thanks for the help