Heya, as cneanlob has suggested, I'll be uploading all of the files that the stickied post on the main thread suggests. This link includes: a save file which shows both effects of the bug (in my case), a DxDiag output of my system specs, and an output_log after starting the game, playing through the combat in the bog next door, and then saving and closing the game.
For the record, I didn't have this problem until I started using Eccea's Arcane Blaster, and even then it wasn't an issue until I started using it with a melee weapon in the off-hand. Also worth noting: my reload speed receives A LOT of bonuses in combat, and I've seen posts about the reload speed bug from stealth which may be contributing to this problem (an additional -85% reload on top of the massive amounts I already have may have broken something).
Problem 1:
All weapons with reload animations go into a reload loop whenever you try to use them in combat (and you keep reloading outside of combat). I'm unable to attack with reload-required weapons at all.
Problem 2:
Because this happened to me with Eccea's Arcane Blaster, and I guess I got lucky, ALL of my ranged attacks with non-reload-required weapons now fire increased projectiles. To highlight this, in the save file I have a scepter which can have its attacks bounce to an additional enemy. Both shots will bounce, which is pretty cool in terms of making custom weapons and modding, but kind of sad when I can't fire most weapons.
Because of my progression through the game, recently I've been bowling through easier packs, and I'm not sure when this problem first presented itself. I first noticed when storming Deadlight, but my previous hard save was over 4 hours earlier so I didn't bother going back. RIP Devoted.
Good luck nailing this one down guys.
https://www.dropbox.com/s/gnhetp43cg5sj7f/Pistol%20Reloading%20Issue.zip?dl=0
Edit:
One thing that might be worth mentioning is that I was experimenting with Mordwyn (talking sword) and that Woedica mace in my off-hand, and that both of them give bonuses that might influence this loop. Mordwyn in particular has that 30% action-speed thing going on which could blow reload-speed to the moon and back depending on how stacking works. Perhaps if you get reload speed below zero for any amount of time using any combination of reload-speed items/effects and action-speed items/effects it doesn't know what to do and starts looping? God-speed.