HMPE, Dyneema, Spectra, FF...I'm with Javi on this one.
I've had several bows break on me, known of several more. Only two of them had a FF type string on them (it actually was original FF). Both were old bows with skinny strings and unpadded loops.
I've said it a ton of times before--when a bow blows up and it has a FF type string on it, the knee-jerk reaction is to blame the string. When one blows up with a dacron string on it, then something else gets blamed.
Well, let me back up a minute. I do know of one other bow added to the list, that pretty much exploded and it had a FF type string on it. Thing is, it blew up the first time the owner pulled it to full draw, and according to the bowyer it was a new bow. Obviously the string had nothing to do with it.
Anyway, my point is without any other evidence, just based on my experience, dacron shortens the life of bows more than FF. I don't think that's the case at all, just making a point.
Chad