I love the idea behind Lochnagar ammo, a high risk-high reward shot for skilled gunners. Unfortunately, I think the design is flawed. Unlike other types of ammo, which may be better or worse on different guns, Lochnagar is the only type of ammo that straight doesn't work on certain guns (such as Gatling or Flamethrower). This is bad for a couple of reasons:
1- The most obvious, it limits gameplay choices. It could be used in several different guns, but by design it can't, which leaves the gunner with fewer tactical choices.
2- It's very bad for newbies. I've seen many youtube videos in which a newbie loaded Lochnagar on his gun and wondered why it didn't work. Hell, if I recall correctly there was a point in the TGS podcast in which someone tried to shoot a gatling with lochnagar and wondered why it felt like a pea shooter (maybe it was on some other video, please correct me).
So how can this be fixed? I think there is a simple way to deal with the issue with Lochnagar ammo, and it is the following:
Divide the damage the Gun gets from firing Lochnagar by its clip size.
It doesn't have to be exactly that, it can be twice the damage THEN divided by clip size or whatever. The idea is that the weapon breaks after a consistent percentage of the clip size has been used, so if you're used a one-shot gun it will break right away, while you'll be able to empty anything from half to a full clip when using a gatling, before it breaks down.
I think this would make Lochnagar scalable between different weapons while keeping its background drawbacks (terrible rotation speed, self damage). What do you think?