The good folks at HMdb, Historical Marker data base recently featured the historical marker at Fort McAllister detailing times the fort came under naval attack.
July 1st and 29th, 1862, and Nov. 19th-- by ironclad Wissahickon and two escorts. The Wissahickon was hit below the waterline and withdrew after firing seventeen 11-inch and 25 other shells. The escorts fired forty-nine 100-pdr and forty-two other shells.
JANUARY 27, 1863-- Monitor Montauk fired sixty-one 15-inch and thirty-five 11-inch shells (first time 15-inch shells had been used against a land battery)
FEBRUARY 1, 1863-- shelled fort for five hours
FEBRUARY 28th-- destroyed blockade runner Rattlesnake, former CSS Nashville
MARCH 3, 1863 Monitors Passaic, Patapsco, and Nahant under Captain P. Drayton engaged fort for eight hours.
I had never heard of an ironclad by the name Wissahickon.
Watch Out for Those Shells. --Old B-Runner