So, it turns out, everyone’s favourite Royal Navy battleship, the TOG II, has been using the wrong gun all along. The Tank Museum proclaimed it as a 76mm (17 pounder) for the longest time because that was the breach inside, but it has now had the actual rifling measured to be 94mm.
A 17 pounder breach, for a 94mm barrel, makes this the 28 pounder/ 3.7 inch gun (not the 32 pounder, as that has a different breach and larger cartridge).
Video for reference:
I hope Wargaming picks up on this. It would rock for the TOG to have the 230 alpha damage of that shell.