A "fair" question.

eekeeboo: Just to be clear ammunition does not affect RNG on aim, dispersion or anything else. What ammunition DOES do is affect the velocity of the round which can affect the amount you need to lead aim etc. But this is not reliant on the amount you pay on the ammo, it's the ammo type and how it behaves.    The best thing you can do to help your aiming, get better equipment, use highly trained crew, get a feel for your tanks shooting behaviour and embrace the RNG when it comes to snap shots. KV2 doesn't always 1 shot random shots at the start of the game aiming at nothing, but when you do, you remember it.