I've been bowfishing for many years and I'm pretty rough on fish arrows... most of my bowfishing is concentrated during the sucker run in the shallows on the Black River in Wisconsin, its very shallow water and full of rocks which are very hard on arrows andI splinter and shatterfiberglass arrows quite often on impact,I've never hadone shatter coming out of the bow though, in fact alot of times I keep shooting arrows after they've beensplintered and still dont have a problem with them coming apart coming out of the bow, but then again I dont run anywhere near 70lbs...

shooting in the rocks like I often do I shatter arrows so bad sometimesthat it shears the points right off the end of the arrow so I usually run a light weight cable system that I make myself on my arrowsjust to keep from loosing my points, when one starts to splinter on the end I usually just pull the tip, cut it down some, reattach the tip and rerun the cable, until it gets too short or too badlysplinteredto keep using anyway...
the only points I've found so far that take the abuse of the many direct rock impacts that I put them through is the warheads, everything else I've tried gets demolished fairly quick