I’d have to remeasure, I beleive my draw length is 27.5”. Also, I’m shooting 3 underLots of variables you are leaving out here. Would be really useful info to know your draw length. My arrows aren't too much longer than yours, but I have a 31" draw length. I know guys with 27-28" draws who shoot 31" arrows because they wanted that particular arrow and cut it long to get it to tune. Your release form also plays a part in the tune. A consistent smooth release shows up differently than a plucky type release and arrows will react differently to each style. You shoot 3 under or split? Lots of variables to consider. I will echo what has already been mentioned, 400s are going to be stiff at 40-50#s unless you shoot a ton of point weight. The amount of weight you put on the back of the arrow changes spine too. 3 feather, 4 feather, short feathers, big 5" feathers, wrap, no wrap, all that matters.
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