RE: Bow efficiency?
BF is pretty right on...I'd like to make two comments...the first is a personal thing, the second, just food for thought.
1)because the 60 lb is at a much lower peak weight,individually it may or may not feel harsher than the 70 lb bow...for me it does not..I prefer less peak weight that may be stout throughout the entire draw rather than a cam that ramps up to 70 pounds super quick and dumps just as quick..it feels "sloppy" to me, and annoys me to no end.
2) look at the majority of Norb Mullaney's Bow reports...here we see bows that should "AMO" in in the 230-235 range with the specs they have, yet the efficiency is so poor many are hitting in the mid or low 220's...The Clearwater Storm model done fairly recently is a perfect example...6.5" brace height and it won't hit 230 FPS AMO. The PSE Quantum is another example.. 7.25" brace and it was clocking along at 225..and these are not easy cams to draw either. I remember a Pearson hard solocam with brace hovering around 6" that clocked 229 AMO. That's poor. I'd rather take the more efficient design any day. Why put out the effort for a "loss"? For example: bows Norm Reported on like the Mathews Zmax, and 2K Bowtech Extreme Solo were clocking 13-15 FPS faster with the same appx. brace heights as the Pearson model The cams are all similar in feel (I've shot and/or owned them all). So many times the same amount of effort doesn't produce the results because of inefficiency in the particular cam/bow system.
JeffB <img src=icon_smile_big.gif border=0 align=middle>