Sernv99, handling dynamics are described by weight, balance (teeter-totter point, not some over-all judgement), unmounted swing effort, and mounted swing effort. These four are measurable and provide a quantified description of any individual gun. Of course, how individuals react to any given set of numbers - "fingerprint" if you will - will vary; this is why there is no general agreement as to what constitutes desirable handling. One man's go-to gun is another's pig-on-a-snow shovel.
Establishing a personal handling "fit" is functionaly the same as establishing a personal stock fit - except that we don't have handling fit pros (yet). So, you have to rely on your personal experience with guns. I have a data base of about 600 guns. Tell me what you like a lot and dislike a lot for one single shooting purpose. I don't have a RBL, but will make it a mission to get one if you are interested in pursuing determining the probability of satisfactory handling with the RBL.