Damaged turrets can happen due to quite small things. Way back in the 1970s one of the University OTC Saladins had the crew forget to travel secure the turret while going over to St Andrews, and on a downhill section of road the turret swung round and the barrel swiped and destroyed a concrete streetlamp.
Required a new 76mm gun barrel (even though it loked perfectly fine visually) and workshop inspection to check the turret race bearings ( IIRC, I was in the Territorials then as it paid much better than UOTC, but had a friend who was in the UOTC).
Interview "without coffee" for the officer cadet in charge
