Hi Sooner_Hunter, Rack Attack and Bobcat 10,
if the arrow and head total weight is 417 then the ke is 43.61.
That is what I' m currently shooting. I' ve also been posting this problem with my bow speed on the PSE Archery forum as well. It' s been suggested that the Redhead Carbon Supreme' s may be inherently slow for an unexplained reason. Also contributing to my speed loss is possibly the peep sight with rubber tube, and I think that the Whisker String silencers aren' t helping either. I definitely want to keep the Whisker Biscuit though. Also, after hunting season is over, I think that I' d like to replace the PSE bow string with a much thinner Zebra ZS twist string. From reading about the Zebra, it seems to be thinner, more stable in rotation and will support a tubeless peep sight much better.
Kindest Regards,
-Will in Maryland