• This cartridge was developed in 1988 for the IMI (now IWI) Desert Eagle semi-auto pistol, exclusively marketed by Magnum Research. Just like the pistol, this is a mammoth round and is considered one of the world’s most powerful semi-automatic cartridges. This cartridge is almost exclusive to the Desert Eagle semi-auto pistol, although AMT produced the Automag V in this caliber for a while, and now Magnum Research is also marketing a revolver in this caliber.