Is this possible ??
 

I'm reading an article by Bob Robb the other day, and did'nt believe some of his "spec's".He was talking about finding a happy medium with your arrow.A balance between KE and speed, and forgivingness.He stated that his bow,(I think he's shooting a LEGACY), shot 270 with a 387 or so grain arrow.He bumped up the weight to 443 and only lost "5" fps.He also GAINED like 6 more pounds of KE.
There's NO way that right, is there ??.

RE: Is this possible ??
 

It's entirely possible, yes. Different bows handle different weight arrows differently. Some bows retain energy better and thus put more into a lighter arrow, some do not. Some work excellently with heavier arrows, some lose energy and speed with them due to their individual geometries and draw-force curves. Based upon your input, you have a differential of 56 grains. The normal average of speed loss is 6 grains of arrow weight for every 1 foot of speed, so realistically he should lose around 9.3 fps, not 5fps. BUT, as stated, every bow and setup is different, so 4 feet is not out of the realm of things in any way.If he can use a heavier arrow and gain KE and produce a quieter shot with less vibration thru the system, 5 fps is definately worth it IMO. Good shooting, Pinwheel 12

RE: Is this possible ??
 

Hi numbers do seem a bit off but anything can happen. Like Pinwheel 12 said each bow store energy very differently. I can see where he could get that but I wonder if he stretched it a bit, who knows for sure but him!

I agree most of the time that 5-6 grains per 1 fps is about right.