Anyways, if we do want to change the description, these are the ranges I propose:
Very long range (beyond 1.75km)Not much to say - 750m/s projectile speed, 2250m max range and no spread; it should be the only gun that deserves this title.
Long range (1.75km or less)Long shell life for Hades and LJ translates into max range, with high projectile speed thanks to Lesmok. The Artemis' naturally high max range and projectile speed, not to mention its lack of spread, lets it make this tier.
Medium range (1.25km or less)- Hwacha
- Minotaur
- Heavy & Light Flak
- Banshee
- Flare
Guns here are either limited by max range, spread, or low projectile speed accompanied by shell drop.
Close range (500m or less)- Heavy & Light Carronade
- Flamer
- Gatling
- Mortar
- Mine Launcher
- Harpoon
Again, mostly due to terrible max range or projectile speed.
I assumed 3.5 seconds on guns with long shell life (i.e. LJ, Hades, H.Flak, Mino); that's about the longest it can take for shots to consistently land. Calculating the values, they seem to fall into the categories pretty accurately.