Just guessing here but I think most PTO owners prefer using 3/8 steel cable. That cause PTO winches will usually pull till something breaks. I think most electric guys prefer 5/16 because its slight less battery drain during spooling and provides more length for self extraction. Synthetic rope is better concerning recoil but does not stand up near so well to dirt and abrasion. I guess it can be washed. I think a person could get by with a quality nylon kernmantle rope (climbing rope), That's roughly 8000 pound straight pull for 10 mm rope If nylon rope breaks there is minimal recoil danger.