This video from Explosive Enterprises covers the 40Wad 40mm airsoft shell from 40Max, which uses a unique plastic wad to hold about 200 BBs. The shell has a self-contained base that holds more gas than the original and allows for interchangeable barrels. While the shell has a very high capacity, its low power and range limit its use to short-range, indirect fire. They point out its high capacity and quick reloading as pros, and its narrow use case and need for consumable wads as cons.