Trophy definition varies... I would say most pond owners would define any HSB in the double digits to be trophy fish.

Smaller HSB can tolerate warmer water with lower levels of dissolved oxygen. Once they begin reaching trophy size, they have much high requirements for lower water temps and higher dissolved oxygen levels. That is why few pond owners grow HSB over 12 pounds. It's about that size when they really need cool water and DO in excess of 6 ppm.

Having a pond that stays cool enough and has DO level high enough to support HSB in excess of 12 pounds would not be common in most of GA.