Thread reminds me of Lucky. Ima try a single srs shitpost just to see how it goes.
I think I know where you've gone wrong here. That damage for the Incisor is per burst, not per bullet. It doesn't do more than 3x the damage of the Raptor, Mattock or Indra per bullet, that should be entirely obvious if you've played with any of them.
It actually isn't a bad gun (IMO probably the 3rd or 4th best uncommon). It's sustained reload canceled DPS is actually 2nd highest in the Sniper class (behind only the Valiant) and every so slightly higher than the BW and Javelin's (and a fair amount higher than the Widow's) but this is before taking into account that all 3 of those guns can double or triple their sustained DPS against the only targets where it actually matters due to their innate piercing, whereas the Incisor falls behind with the ability to only increase it by 60-120%, unless maybe you use AP IV ammo with no piercing to avoid the penalty (where 1.5m isn't enough to get a lot of double hits, so you're still losing out vs Crabs, Fantums, Atlases, Banshees and clustered up toasters).
However, that's only theoretical. In reality, since the Incisor lacks burst damage, which is how you really achieve a high kill rate vs the targets you should be prioritizing (mooks and sub bosses), and you will practically never achieve that number even in a perfect situation vs a boss anyway, it really falls behind. Targets will roll/dodge the moment they are hit by the Incisor and cause misses, and you usually need at least 2-3 bursts to bring down a shielded mook even with cloak and most rounds hitting the head. Let's not even get into how superior the 3 heavy hitters are against sub-boss targets like Fantums, Goons etc, which the Incisor takes ages to kill, while the Widow/Javelin user killed them immediately with the first shot and is already firing at the next target (or 3). Even against the big slow bullet sponges, you're only going to get better DPS than those rifles with an Incisor if A) no one is taking advantage of double hit bugs for some reason and b ) nothing is shooting you, thus allowing you to stand there plinking burst after burst away. In practice, the ability for a Widow/Javelin/BW user to only pop out of cover momentarily (or even just wallhack and shoot through said cover with plenty of piercing distance still left over to do max damage) avoiding damage while still delivering full DPS is going to be better in almost all circumstances. Imagine trying to solo a Fantum/goon death squad or geth Prime duet with an Incisor vs any of those 3, and you can see why it is a vastly inferior weapon.
This is before we even get into the fact that on damn near every character where it is worth using (basically infiltrators and possibly the TSent/TSab), you have to build around it with stability mods/gear to even make it viable due to its ridiculous recoil. This drastically reduces your effectiveness, as otherwise you could have equiped Scanner/Grenade Cap/Armored compartments/Assault Loadout/ Adrenaline mods/Power amps/Cyclonics to increase your damage or survivability, not stability gear just to make sure you are getting sufficient damage from the weapon at all.
Dunno why you've bothered to calculate a useless number like how much damage between ammo runs when all have far more than enough ammo to wipe out several spawns and finish entire waves (especially with the clip upgrade, which you can equip on the 3 heavy rifles at little penalty), ammo crates are everywhere, and you have TCPs if all else fails. The only time I can see this being relevant is if you are playing some garbage map on Plat (Dagger Hazard, Condor) with like two Derperus Carriers in the same lobby or something, in which case you are in Platinum where you really shouldn't have brought an Incisor anyway.
Actually, the Raptor is slightly better IMO, due to the fact that it puts out as near as makes no difference the same sustained DPS as the Incisor while being slightly lighter, having a much lower hipfire penalty, and needing no help from mods/consumables to be made usable (apparently lesser players need a macro or turbo controller, tho). The scope is also much lower zoom and far more suited to the types of ranges the weapon is best at, while the Incisor has a huge zoom level that you can't really put to good use because its recoil makes it not very good past close-mid range.
Locust is only better than either of these on a Marksman kit, where it is admittedly pretty amazing at least vs mooks, or a power damage based build (i.e. QME and QFE, Furry) that will benefit more from a power amp, faster cooldowns and lighter weight (and in the Incisor's case, not requiring stability compromises).
Gosh, you have more time and patience than I do for sure. But yeah, this is accurate.