I had good luck with a bow that pulled in the low forties with squirrel rawhide. I don't know about a 60lb bow and rawhide. I think it is possible, but your string would be huge! I used three plies of fox squirrel rawhide on mine, I don't remember the measurement, but I think I cut them about 1/4" and stretched them pretty good while wet. Made a pretty durable string. I never put any type of preservative, wax, oil or anything on it, and it has been on the bow a year or so with no bad effects. Mine shot pretty good, maybe a little on the slow side. I left the hair on it and it looks cool even if the performance isn't top of the line.