Out of three crossbow sights...no excessive string breakage that I've seen.
Some serving problems here and there, but that NOT strings breakage.

Though I've only got a few hundered (maybe 250ish) shots thru it, my Strykers (406fps) string is holding up well.

No tellen what people do with their bows. A little dirt or some other grit will destroy a serving. But the shooter should notice this and stop shooting BEFORE...the string gets damaged.

Mike