I am not sure if this is your soldier. He is listed from Troup Co, but in the 13th Georgia. He died in VA 1861.
Porter, David A. F-21 Ga.; July 9, 1861; killed Cross Keys, Va.
Porter, James. F-21 Ga.; July 9, 1861. Porter, John. F-21 Ga.; July 9, 1861.
Porter, J. W. K-13 Ga.; July 8, 1861; died Blue Sulphur Springs, Va., Dec. 6, 1861.