Duplicate Transmutation, Arifureta Vol 1

He was very precise with how he made his bullets too. He used taur for the shell’s core, and applied an outer coating of shtar over it to harden it. It was his fantasy version of a full metal jacket bullet. He also made sure his ratio of compressed blastrock for the new bullets was perfect. Thanks to his Duplicate Transmutation derivative skill, he was easily able to mass produce the bullets once he had finished a satisfactory prototype to work off of.