I have a 2004 BK set at 70# 29" shooting 450 grain GT Hunters. I'm getting around 285 fps. With 350grain arrows I get around 315fps. I think the four limb savers and hush kit are slowing it down quite a bit but then it is dead quiet. Cant honestly think I need any more speed than what I'm getting and I would prefer a loss in speed in order to keep it quiet. Makes a great hunting bow, lots of KE!!!!
Shoots great out to about 40 yards. If my forms not good on a specific day it goes to hell at 50 yards
I actually get better groupings with the BK than I do with the Tomkat.