Sorry, I renamed all 10mm and 6mm Clips to 10mm and 6mm Mags because tons of gun nerds play this shit that I wanna kung fu the shit out of. So that means if you're loading an old save and you buy new ammo, it won't stack with your old ammo in the inventory. Here's how to fix it:
1) Turn on world editor mode in the launcher and load your save.
2) Press F2, left click the mouse to open the command prompt.
3) Type "renameAll=10mm Clip,10mm Mag" and press ENTER (comma between parameters).
4) Then type "renameAll=6mm Clip,6mm Mag" and press ENTER.
5) Leave blank and press ENTER again, then press ESC to leave the world editor
6) Save your game, then quit the game.
7) Relaunch with world editor mode turned off again so you can get Steam achievements.
Last fuckin update, I swear. I wanna work on my stupid magical fantasy DnD ripoff now.
EDIT: This is just in case any other chode-smoking gun nerds come at me in the future.