If you're just after a meal, then I think it's more of a personal preference. Myself, I consider 8" about my minimum on BG.

Are you trying to manage for bigger BG? That will play a huge role in deciding what fish to keep, including your LMB.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.