Sorry that arrow is way too stiff even full length. I owned a Horne a while back and it was 52#s at 28"s and so right about 54#s at my draw. I shot a Heritage 150 cut to 29.5"s with 225 grains up front plus a footing so right about 240 grains up front. I think you are so overspined that you are getting opposite results. I am shooting a set of custom ILF recurve limbs that absolutely smoke and am shooting a .500 spine cut to 29.5"s and a 190 grains up front for perfect arrow flight as long as I do my part, just as an example. Carbons are a different animal, throw out the calculators and use some common sense. A 35/55(.500 spine) is designed to shoot out of compounds that are just that, around 35 to 55#s with 100-125 grain point, so figure a less efficient bow(recurve-longbow of near the higher end of that weight range) will shoot that same arrow with a lot more point weight. Just basing arrow selection on that fact alone, why would a trad bow of 50 to even 70#s shoot an arrow designed to be shot of of 60-70# compounds, makes no sense, even when left full length a 300 spine arrow would would need 400 grains or more to soften it out of a 60# recurve. Sorry to rant but this is not rocket science. Shawn