I'm with PD. I have literally not been able to wear out a FF string. I've been using 8125, nto for any particular reason except it was recommended to me.
I have one bow which is ERC (so very soft wood) no tip overlays, just pin nocks, and aroun 50#@28", been shooting for years with a FF string. The nock grooves have marks from the string but who cares.
I think because wood absorbs vibration better than FG, it's actually much more suitable to FF.
I find many of my wood bows are nearly silent ... not so for my glass ones.