I get 7"-8" long LMB a year after they are spawned, farther North and in a bass-crowded pond. IIRC in the gulf states they can do 12" in a year. So 10" might be a reasonable guess for SC. Greg Grimes should have an excellent idea.
But my problem is that i have been teaching kids how to fish and they are fishing the pond all the time everyday. I try to tell them there are 4 other ponds in the area with fish as well. I guess i shouldnt complain i tought them and they all have become pretty good. Better than playing the playstation or looking for that easy button for everything.
Amen to that.
Have them fish for those 1700 BG. More targets and much lower impact on your bass.
And remember, you're not just raising champion bass, you're raising champion kids!