Not Jeff B, or anyone with staff knowledge. I have some idea because I have played with a few Frankenstein bows, and a few others where limbs needed to be replaced with non-factory limbs (Champions that have no factory limbs available). I can tell you absolutely, for certain, that it depends.

Most of the bows that I have messed with, 1" shorter ATA meant about 10# more peak weight. A few that I've tried, it meant a little less, maybe like 7-8. I think it is all due to limb deflection values.