Talk:The Twins/@comment-67.191.143.124-20120817221355/@comment-5401819-20120818172802

You'd have to collect an absolutely ridiculous amount of ammo, (1090-1470 if you had a basic star cannon with no upgrades to damage) An adamantite repeater with cursed arrows or hardmode spells with a mana flower might be a better choice.

Also, hellstone isn't the only block you could use, there's also meteorites and spikes from the dungeon.