This is the 14560th most frequent Russian word.
патронами
"Патронами" means "cartridges" or "rounds" (ammunition).
Here, 'патронами' refers to ammunition, as related to hunting supplies.
Мы должны запастись патронами для охоты.
We need to stock up on ammunition for hunting.
In this context, 'патронами' imaginatively refers to cartridges that contain blood, a fictional or hypothetical concept.
Патронами для крови никто не запасся.
Nobody stocked up on blood cartridges.
Here, 'патронами' is used in a figurative sense to convey the literal running-out of resources in a conflict.