My glassed Schulz bows are a couple of pounds lighter than that, but my draw and arrows are the same as stated above. Those are the spines that I use out of my Schulz Legend. To get to that weight, I ordered arrows extra heavy for the spine from Rogue River, now Wapiti Archery. Once when getting lectured a bit by John's wife for shooting too stiff an arrow, John interrupted and took the phone. He explained that she thought that I was shooting an all bamboo bow and when he realized that it was me, he knew that I was shooting a very fast glassed backed bow. I got the impression that he thought that the all bamboo bow required a lighter spine when cut to minimum lengths than the glassed models. Leaving them with much extra length is just too much of an un-Schulz thing to do. I would not be at all surprised if you not find a 55-60 with a 160 broadhead to be a more accurate arrow from that bow at 27" bop and more in the mid 50s if you go with a lighter head. As far the weight, maybe give Wapiti a call to see what they have in a heavy shaft for the spine on hand. I would still go with what flew the best over starting out with a targeted weight.