Chaps - Lets get back to basics. A loadsheet is designed to show where things are loaded and how heavy they are. This will affect how the aircraft flies. However, the aircraft manufacturers and the certification authorities know that we don't live in a perfect world. Therefore, we have loading limits which allow for a "reasonable" amount of slack - heavy aircraft (if using average fleet weights), non-standard passengers (in both body and luggage) and the SLF not sitting where it is meant to and let's not forget the cabin crew (some of whom are not standard weights!) who move around with really heavy carts during flight. ALL of this is taken into account.
However, if the Captain decides that standard weights are not acceptable, then actual weights have to be used. This may happen say, for example, when moving a plane full of Sumo wrestlers or you find you are taking passengers to a dumbell collecting conference! Or, as I have said earlier, you may want a non-standard C of G for operational reasons. But these things don't happen (generally) because there is an "R" in the month. You know in advance and then, together with the Dispatcher, we load the aircraft in an acceptable way to achieve the desired outcome.
So, going back to an earlier post - if it's in it's OK. Deciding on a "whim" to have different, non-standard loading is like saying "Let's ignore SOP's today" - Muppet territory!