The thing could use maybe a 15 degree firing arc, just so you don't have to turn the ship to aim. After all, most capital ships don't have stuck turrets, and it doesn't make sense for them to. With such a small firing arc, it'd still be next to impossible to manage it (though Gafwmn did it once).
That's my two cents on the gun. As for the refire, do you see cannons on modern-day battleships and cruisers spitting out 1 shell per second? No. Maybe one every three or four seconds, but hey, they have multiple barrels.
A way a lone a last a loved a long the riverrun, past Eve and Adam's, from swerve of shore to bend of bay,
brings us by a commodius vicus of recirculation back to Howth Castle and Environs.
