This is why I laugh when I hear people talking about doing things to their bows that change the speed by 2-5 fps. Most chronoesI have seenare not that accurate to begin with. Same with bow scales in most cases. If you have 5 shops in your area take your bow to all of them and check the weight and speed. And I bet you get at least 3 different readings, if not 5.

I wouldn't be shocked if you got different readings on different days from the same shop. I don't think they would be way off, but they might be different.

Paul