Bill, I don't have any experience with the GG, so I don't have a basis for comparison. I figured the round shape of a HBG was influenced by it's BG heritage... MBG x FGSF might equate to a fish with a more circular profile, while a reciprocal cross MGSF x FBG may produce a more elongated fish.

These are from one of my ponds, and I can state with certainty that they are not GG. They are developing the rounded shape you speak of:






"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.