anybody know anything about these arrows? @ the proshop someone told me they guarantee 40 fps. maybe. but are they heavy enough to pack a punch on contact?

Unless you're shooting one of the brand new High Country bows - that arrow will void your warranty and could damage your bow.

Those arrows are smoking fast, and pack plenty enough punch to hunt with. I use them in my 07 Iron Mace. Problem is, if your bow isn't warranted to handle an arrow that light, you're really playing with fire.

People with Barnsdale limbed High Country bows are now finding out that the only parts that will be warranteed for life of the original owner are the riser and cams. The Barnsdale limb only carries a one year warranty, and High Country chooses to not extend that warranty as other companies using Barnsdale limbs do.