A hunting partner, predominately uses training wheels, recently moved to a new hunting show that has Blood Sport Arrows as a sponsor. He was very excited about these shafts and they looked nice. Unfortunately, when he arrived a decent sized Oklahoma does in the shoulder 2 days ago the shaft partially broke at the insert/outsert joint. He's big into heavyweight Arrows but couldn't get these as high as he likes, normally over 650. These finished out just under 500. His Griz Stick Momentums are a shade over 700 (as are my Grizz Stick Alaskans) and I have no doubt that they would have blown through her scapula with ease.
So not only did the light arrow fail to produce a pass through upon contact with "heavy" bone, but the ultra skinny shaft broke on contact, even shearing off the thin blades.