Max attainable size? Lets' check the MO records.
BG.....3lbs. Don't count on that, exceptional fish.
GSF....2lbs, 2oz. Wouldn't hold my breath there, either.
HBG.... The list simply says, "sunfish, hybrid". Lots of room for interpretation there. Anyway, 2lbs, 3ozs.
This numbers are in line with states all over, and reinforce the fact that BG have the largest size potential. If you want to up the fun factor regarding recording the sizes of fish you're catching, print out a relative weight chart for the species you catch, and use it to help determine where your fish are at, growth and size wise. This will be a big help in determining what size classes of fish you should begin to cull, as well as helping you identify those desirable qualities you want to remain.
If you're not after trophy HBG, then I would keep them for the table once they reach a size you prefer. I would also keep the GSF.
RW charts here:
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=160456#Post160456
