I am a little confused. I am realtivly new to bow hunting, first year. I was looking at a new bow and it lists the speed as 310 fps. I was talking to my hunting partner about it and he asked if that was IBO speed. I looked at him with a "huh" look on my face. He couldnt explain it either, had heard that the FPS and IBO are different.

Can some one explain this to me? This is probably a very basic thing, but I have never heard it before.