Another great bullet!!!!! Your bullet is listed in Civil War Projectiles II by McKee and Mason as bullet number 208, they list the bullet as tower for rifled musket. This bullet comes in at least two variants, a pointed version like yours and one with a flatter tip and a slight ring near the top. The later is shown in both A Handbook of Civil War Bullets & Cartridges as bullet TT202 and Round Ball to Rimfire 4 Bullet number 595. I believe this bullet is now believed to have been used for the P-51 rifle musket or "Belgian rifle"
I have heard some say that they believe this bullet is attributed to SC troops but I have nothing to confirm this claim.
Attached is a picture of the one shown in both the Handbook and RBRF4