The A10 was originally designed as a tank killer, and the depleted uranium rounds were for that purpose. I don’t know if the Gatling gun would work right with FMJ rounds.
“I don’t know if the Gatling gun would work right with FMJ rounds.”
Wiki
The standard ammunition mixture for antiarmor use is a five-to-one mix of PGU-14/B armor-piercing incendiary, with a projectile weight around 14.0 oz (395 g or 6,096 gr) and PGU-13/B high-explosive incendiary] rounds, with a projectile weight around 13.3 oz (378 g or 5,833 gr).[10] The PGU-14/B’s projectile incorporates a lightweight aluminum body, cast around a smaller caliber depleted uranium penetrating core.[11] In 1979, the Avenger was tested against M47 Patton tanks and caused “severe damage”.[12]
An innovation in the design of the GAU-8/A ammunition is the use of aluminum alloy cases in place of the traditional steel or brass.[13] This alone adds 30% to ammunition capacity for a given weight. The projectiles incorporate a plastic driving band to improve barrel life. The cartridges measure 11.4 in (290 mm) in length and weigh 1.53 lb (0.69 kg) or more.
Depleted Uranium is a pet peeve of mine. It still has plenty of energy inside and with the right kind of reactor it could be used.