Found on Old South Military Antiques. Hat worn by Lt. Colonel Edward McCrady, Jr. of Gregg's 1st South Carolina Infantry. The hat bears the hole from a bullet that wounded McCrady at Second Manassas on August 30, 1862. The previous day the 1st South Carolina saw some intense fighting in the infamous railroad cut there as part of Brig. Gen. Maxcy Gregg's South Carolina Brigade, however McCrady indicates in his official report that it was on the last day of the battle that he was wounded.
The bullet struck McCrady on the left temple, knocking him unconscious and breaking his skull, however he recovered and returned to command that winter. He later had two patches sewn over the bullet holes and replaced the silk liner so he could continue to wear it.
A palmetto tree insignia is attached to the hat as well as S.C.V. for South Carolina Volunteers.
A lot more info here: http://www.oldsouthantiques.com/os4017p1.htm