Why does the IBO record top speeds with arrows almost too light for the real life scenerio. I am asking because I don't know what arrow weight to shoot but I still want the 300+ fps. and still be able to take down a huge animal at almost any range(am I asking too much from a bow?)? But I do know a heavier arrow is most prefered. I have read articles on fast bows, and once someone shoots a hunting arrow their speed drops drastically and that is almost enough to turn my head away from that bow. AS YOU KNOW BY NOW I AM NOT A VERY EXPERIENCED ARCHER. I also need help choosing an arrow I am pretty sure I will be purchasing a Firecat Pro X. From what I wrote can Someone please help me with my dilema?