[Radu Lykan]

Well I have fired a shotgun and I can tell you, I wouldnt like to be on the receiving end of it.

lol, i remember that, didnt it blow the target off its hooks? combat shotgun ftw!

theron looks fine, the only thing i would change is the way the reloads/ammo are written. rather than 2 reloads with every third bullet manstopper just say 8 regular shells and 4 manstopper. this allows for a bit more flexibility when using them in game. if you are being charged by a genestealer then you might want to load (and then unload) all the manstopper shells in one go. or just run.....
looking forward to the updated fluff. 

[Inquisitor Cade]

Well any manstoppers in the gun at the start of the game should be specified (although if the naval pistol is a revolver, which I assume it is but don't know the manstopper can be rotated into next in line in a single action. As naval pistol bullets have to be stored loose it the manstopper shells can be loaded in any order.