My dad served on the USS St Paul, CA-73 during the Korean War. He was the fire control director for the 5" guns on the port side. In-game the cruiser we have is a USS Baltimore Class cruiser, of which the St Paul was the 7th in the class.
On October 2, 1970 the USS St Paul shot an 8" experimental round 60,624yards, or 34.4 miles.
The round is pretty interesting. While 8" it was a modified 5" round with a sabot, very similar to a standard 105mm or 120mm sabot round, though these rounds were explosive.
boo