Yup, and there's the problem. Greased doesn't have an 85% hit rate. Ships like the Junker have such a small hull profile and such a high density of components that it's literally impossible to land enough hits. Try it out. You're not going to be getting 85% in unless the enemy ship is sitting a few metres away from your gun.
Optimaly, you want to use Greased against ships that have a larger profile than the Junker outside of point blank range, but that is something you just have to do, doesn't change the maths, the ship is just so damn small, still, the increased DPS is reason enough to close distance now instead of just standing there in mid range, cause now the Gatling will require an 98% hit rate to actually strip armour even on light ships and you wouldn't strip a Junker's armour in one go of Heavy clip anyway, the Junker has 700 armour, the Gatling with 45 bullets, assuming perfect accuracy, will deal 765 armour damage, even if their engineers are total nutjobs, they will get a Mallet stroke in there upping the total damage you have to deal to 950. So you won't be taking out their armor anyway with Heavy.
Which means 3 things:
Using the ship with the lowest profile of them all isn't realy valid.
Using a ship whose armour you can't even drop in one go with Heavy clip isn't realy valid either.
Junker indirectly buffed. lol.