I agree about the 65# max bow and tried to special order my last one that way- I didn't quiet get what I asked for.

As far as the speed rating goes 65#x 5 gpp= 325 grain test arrow. No need in a new formula.

Although a 29" draw 400 grain arrow "hunting" formula would be nice to see before buying.

I also let down my 70# bows to ~65, but always wonder how it effects tunability sincethe string length, cable length and cam timing marks are allbased on a bow set up at peak weight. Letting the bow down shrinks the ATA at tad bit and increases the brace thus altering all of the above mentioned tuning parameters. Is it enough to matter? I don't know but it's something I always wonder about.