Adamantite Shells

Adamantite Shells were the most powerful crafted bullets in Azeroth, before the introduction of Mammoth Cutters.

Source
This item was created by using Adamantite Shell Machine. The machine had 5 charges, allowing the user to create up to 1000 Adamantite Shell.

The Adamantite Shell Machine could be crafted by engineers with a skill of 335.

The schematic was sold for in somewhat limited quantity by:
 * in The Exodar
 * in Shattrath City
 * in Silvermoon City