Well, I thought I should update. The arrows are 467 grains as built. They are flying like darts out to 40 yards. Literally, I can put them in a 3" bullseye at 40 yards, if I do my part. For now, I've been shooting sitting or prone. I want to set up a rest to see the true potential. They are definately minute of deer! From my Lumizone setting, the are going about 300fps. I want to Chrono sometime for fun.