since FMJ arrows are alumanum wrapped around a carbon core i dont think you have much to worry about when shooting them. even if the carbon is broken on the inside the alumanum shell should be thick enough to hold it back....i dont know...

those pics scare us all. but most of the time its most likely not the arrows or the bows fault. the shooter hit it with another arrow or pulled it out and broke fibers etc. ive hit a couple arrows with broadheads...without knowing i had to hit them and without checking them i may never found the scratches on some of the really close calls. what i learned? dont shoot groups...pull the arrow straight out...and inspect them...as i walk 25 or 35 yds i certainly have time to check 3-5 arrows...no reason not to. im getting ready to buy new arrows....im pretty sure im going with carbons again. i cant see spending the money on FMJs ACCs or AC slims to have alumanum in them that can and will bend leaving you with a useless 10+$ arrow...thats just me...ive got a couple thousand shots on cheap carbons and i have no problems with them...