I just picked up a half dozen 28" CX 3D SELECTS 300 and they weigh 391 grains (8.1gpi)with a 125 gr point. The owner of the archery store shoots the same arrow, but shorter length and lighter fixed blade broadheads, same bow,and has no problems what so ever and has been shooting that set-up for years.I'd guess his weight at 350 gr.