That's a lot of weight for that hull and it will have a hard time getting on plane, but it will eventually. When I had my Outback, I ran a 750lb sack in the back and put the stock 275lb sack in the rear storage area. I had 2 150lb sacks under the front seats and another 150lb sack in the front of the walkway. That was really pushing the limits of that little boat and it would constantly take on water. The ideal weight for it I found was the 750 in the back and the 2 150s in the front.