Have I fallen into a beneficial glitch or something, because my blood vials replenish upon death but I've seen a lot of people complain about having to grind them out, which even that seems odd to me as I tend to trip over enemy dropped vials as I make my way through the game. My storage container is hemorrhaging blood vials right now. Bullets, on the other hand, are a bit harder to come by and the amount that will replenish upon a death seems to be random at times.