After full length sizing, how close should case measurements be to the case diagrams in loading manuals? Do the diagrams represent minimum SAAMI or some other set of data? TIA

Remember after full length sizing the case will stretch, so the length will be much longer. This varies dependendent on how tight your chamber and head space are.

Case measurement drawings are nominal ........your real concern should be how closely your fired and resized cases fit your particular chamber which will greatly improve accuracy and case life.