Copper ( and therefore Brass) are essential for 99% of all ammo, as we know. Well it's about to get real tight and real expensive. If you haven't been conserving what you've got (factory or for reloading) I suggest you do. Until I see some light at the end of this tunnel I've decided to suspend all shooting that isn't absolutely necessary. And by that I mean if it ain't breathing and causing me a problem, it don't get a bullet.