fastpassthrough, I would question the motives of any company using such light weight arrows to try & sell a product. They may be trying to show the bow can take a pounding BUT those advertisements can be missleading & a lot of people are going to try & shoot those speeds. I also saw they are selling some new really light arrows 5.5 grainins per inch if I remember right.....that says to me they are willing to risk their customers well being to promote their high speeds.
Thats just my opinion so please don' t take that as anything personal or anything against the bow. I just feel safty is the number one thing any company should shoot for, they owe it to their customers!