if probably really depends on the design of the bow as to how much difference it might make,, but if you are shooting through a chrono,, you will see the difference in cast your brace can make,, and a good scale will show you the difference in poundage even if small,, there are some examples in the Bowyers Bible,, I cant remember which one,, I think volume one,, and the difference is a couple of pounds, but the cast is better even at the lower draw weight,,