RW is relative weight. It is a measure of how the weights of your LMB compare to a national standard. If you do a search on here you can find info on using them and also the actual tables themselves. To get your RW's, you divide your individual LMB weight by the standard weight for that length of bass...numbers greater than 1 are very good.

Greg Grimes has posted an excellent spreadsheet for this computation.

p.s. at the risk of opening up an old controversy, some of us have experienced very severe Florida LMB catchability problems, especially as related to Florida bass that are larger, older, and may have been caught before. I go so far as to say that pure Florida LMB that are older in my ponds are virtually uncatchable by artificial means.

You can grow them and grow them very large, but catching them may be another matter.