Back 20 years ago, there was no such thing as IBO speed. (At least I never heard of it.) Everything was AMO which is measured a lot slower. I remember a really fast bow was anything over 200. The bows today are smoother and quieter with a solid wall when at full draw. The old bows were mushy but still dropped their share. Had a Jennings ArrowStar back then. Hell of a bow. Wish I still had it.[:' (]