SHTF:
- 300 BLK cases are commonly made from .223
- get a .300 BLK bullet mold
- can use some pistol powders
It actually is a better close range round. Use the same lower as your .223 AR.
During SHTF, I don’t want to be fiddling with resizing cases and casting/swaging bullets individually.
It’s much easier, and arguably cheaper, to just buy more completed rounds than you’d ever need in SHTF than to get the equipment to make your own. Remember: you won’t be making your own primers & powder (those run out, you’re done), and shells/lead/copper will be in diminishing supply; better to get all those in already-completed form. Under those conditions, you’re not going to survive long enough to actually use up several cases of properly manufactured rounds.