I call BS on the KI speeds. I have the ripper 415 and out of the box it shot 395 fps with their bolts. I just bought a Speed 425. The dealer said it was right there it's fast. I asked if I could shoot it through his chronograph. He said no it was in the back and he would have to set it up on the range and there where people shooting and he didn't want to. So when I got home I shot it through my chronograph the highest speed was 402.5 fps. I called the dealer and told him what the bow was shooting, he said call customer support. So I did they said my chronograph was wrong, to sight the bow in and let him know what the speed ring on the scope says. I did well it wound up being 400 fps. Call the Customer support back and had to leave a voice message waited all day no call back. Call them back the next day told them what the speed setting was. They said send them the front end off of the bow back to them. I got it back last night, The notes from the tech said "bow shoots 405 through our chrono, 404 fps is within spec for this model" I have looked high and low but could not find and +/- for this bow. If any one has that I would love to see it. I put the bow back together shot it through the chronograph and it was 395.1 fps. Fyi my chronograph is made by Shooting Chrony Inc. Model F-1. I have checked it to two other chrono at two different Archery shop here in Roanoke va. with only 2 fps different's. I don't under stand how a new bow can shoot so slow. Any one want to buy a new Speed 425????