The question is why were they rejected, I say it isn't because of structural quality, it's because of strick spine and weight requirements which I don't believe is all that good reguardless of what the manufacturer has said they are. I've never heard of a walmart arrow exploding, but I've heard of plenty others. Had a GT XT do it on me about 4-5 years ago and when I contacted the retailer I was told they'd had more complaints of that shaft doing that than any other for that past year.