Don, I agree that quantitative measurements make sense and give a much better representation of a gun you don't have between your hands. However, things like weight, LOP, and drop are relatively easy to measure--and most dealers provide them. Some (but not enough) also provide minimum barrel wall thickness. Some, via photos, show proofmarks. (I wish they all would!) But I haven't seen any yet that have started using your system--at least in part, I'm sure, because they aren't capable of measuring the swing values. (Same reason some of them don't provide wall thickness measurements.) If they ever start doing that, I expect more buyers will begin to take a more detailed interest in your system.
