Custom cartridge made by using a .50 caliber bullet head in a shortened bottlenecked 20mm cannon casing. It is capable of launching a 750 grain projectile at 3,400 FPS with the use of about 330 grains of powder. The FatMac is considered a “barrel burner”, with the average barrel life of a firearm chambered in 50 FatMac to be about 100 rounds before the barrel needs to be replaced. (GRH)
U.S. military issued .22 Hornet (5.6x35mmR) catridges in their original packaging.
Beginning during World War II, aircrew survival rifles in .22 Hornet were developed and issued by the U.S. military. They were a bolt-action rifle with adjustable stock (M4 Survival Rifle), a break-open rifle/shotgun over-under (M6 Aircrew Survival Weapon), and a takedown bolt-action rifle (AR-5/MA-1). Military survival issue .22 Hornet ammunition was loaded with soft-point expanding jacketed bullets, not complying with the Hague Convention. It was later determined that survival and self-defense would allow exemption.
Well I couldn’t resist making one. This is my 2nd shot at casting metal and it turned out much better. It’s a 114gr 9mm solid .999 silver bullet with 5.2gr of WSF powder in a nickel sig case. I had to increase the diameter of the mold in the casting sand so it would be .355 when it cooled. I’d found in my first attempt just doing a straight cast from a factory 9mm bullet ended up with about .350 which is too loose to load.
It’s a novelty item and I don’t plan on shooting it (unless there is a werewolf problem locally lol). I may in the future make another one to try and if I do I’ll post the results.