Each barrel could fire 10 to 12 rounds a minute , thus each twin mounted battery was rated to fire a maximum of 24 rounds a minute .
Four twin mounts could fire as many as 96 rounds a minute .
Each barrel could fire 10 to 12 rounds a minute , thus each twin mounted battery was rated to fire a maximum of 24 rounds a minute , and four twin mounts could fire as many as 96 rounds a minute .