Here is another funny thing a .600 spine arrow can be stiff out of a 50# bow ecspecially a bow not cut to or past center and if a guy has it cut to 28.5"s and is shooting a 100 grain head. Remember please and I do not know why people don't get it, carbons are spined rated for compounds so why in the world do guys think they can shoot a 35/55 spine out of a 40# recurve or longbow cut to 28 or 29"s without adding a whole bunch of weight up front. There is no recurve or longbow that transfers as much energy to an arrow than a compound of the same weight does. Either leave them real long and don't add a ton of weight or cut them the length ya like and add a ton of weight. I am shooting a very efficient new bow Caribow Tuktu EX recurve. It is 54#s at 28"s(which I draw with this bow) I am shooting a .487 spine cut to 29.25"s with 190 grain up front,bareshafts hit dead nuts with fletched at 18 yards and I got a perfect hole, ever so slightly weak thru paper. Shawn