They work out to be about 495g, which is just over 9 grains per # of draw weight. Which is close to the minimum that I' d shoot from it. Surprisingly, at 20 paces and with 2 blade zwickey eskimos attached, the 2016s and my tapered 23/64 cedars that weigh 575g penetrate about the same into foam. They both passed completely through the boiler room of a dead 183# boar that my buddy shot with his rifle.