Maconducks,
I shoot a similar flatbow with similar weight and draw length. I shoot Carbon Express rebels that have taken a beating on stumps and couple of small trees. They are not expensive compared to other carbons and shoot very nicely. I added a length of 7/32, Ace Hardwardware, clothes line to the inside to add 100 grains. I also bought glue-in nock inserts so the rope wouldn't pop out the nock when it hit harder objects. I shoot a 125 grain head with screw in insert added. Hope this helps.