No, didn't know that, thank you!

Hunter112

no what I meant I started a new game and I had 12 gauge shotgun ammo in my inventory and there was no weapon for this ammo

Which merc? The only two that start with 12gauge ammo (and the respective weapon) are Tex and Meltdown in one of her selective gears. The only minor issue I can confirm from the starting gears is Laura who starts with two pistol mags of 7.62x25 in a gear she has no pistol.