Add the following lines to your StarfieldCustom.ini in that folder, if they do not already exist. If the file does not exist, create it.
[Archive]
bInvalidateOlderFiles=1
sResourceDataDirsFinal=
Open your console command and type "bat addammo" This will add 1000 of each ammo type to player inventory.
player.additem 002B559C 1000 ; (.27 Caliber)
player.additem 002B559A 1000 ; (.43 MI Array)
player.additem 02B5599 1000 ; (.43 Ultramag)
player.additem 002B5598 1000 ; (.45 Caliber ACP)
player.additem 002B5597 1000 ; (.50 Caliber Caseless)
player.additem 002B5596 1000 ; (.50 MI Array)
player.additem 002BAE3F 1000 ; (1.5KV LZR Cartridges)
player.additem 002B5595 1000 ; (11MM Caseless)
player.additem 002B5594 1000 ; (12.5MM ST Rivet)
player.additem 000547A1 1000 ; (12G Shotgun Shell)
player.additem 002B4AFC 1000 ; (15X25 CLL Shotgun Shell)
player.additem 0000E8EC 1000 ; (3KV LZR Cartridge)
player.additem 002B5592 1000 ; (40MM XPL)
player.additem 002B5590 1000 ; (6.5MM CT)
player.additem 002B558F 1000 ; (6.5MM MI Array)
player.additem 002B558E 1000 ; (7.5MM Whitehot)
player.additem 002B558D 1000 ; (7.62x39MM)
player.additem 0004AD3E 1000 ; (7.77MM Caseless)
player.additem 002B559B 1000 ; (9x39MM)
player.additem 002B4AFB 1000 ; (Caseless Shotgun Shell)
player.additem 002B558B 1000 ; (Heavy Particle Fuse)
player.additem 002783C7 1000 ; (Light Particle Fuse)