That tube is also unlikely to be capable of burst fire. Rapid fire, sure, but we've never seen it fire multiple torps in one shot, and it doesn't seem like the tube could be big enough to take multiple casings.
One of the things I hate most about the Sovereign is this idea of tiny torpedo tubes with no apparent space for internal mechanism. Out of universe it shows a simple lack of thought in designing the ship. In universe... well if torp tubes are so small, you could put them anywhere. No reason why a Sovereign couldn't have fifty tubes, or several hundred for that matter.
![worried :worried:](./images/smilies/sad-smiley-062.gif)