A fellow stated he was casting a 670 grain arrow at 275 fps. My feeble mind doesn’t work this way. Assuming a “normal” efficiency compound bow, how many hundred pounds draw weight would be required to do what he says he is doing? I thought I was doing pretty good flinging my 490’s at 235 fps!
Well I can't quite get there with my calculator but take this for a start. Assumptions: 340 IBO speed Bow 80 lbs DW 670 gr arrow 20 grains added to the string 31" DL = 268 FPS Not too far off. Essentially the way I see it, you would need a big dude with a long DL, and helluva fast bow, a peep only on the string, pulling 80 lbs to get even close. I think it’s probably physically plausible but not feasible in 95% of real world situations.
