Yes, this is taken from the Wikipedia, and yes, I know this is from the A-10 warthog. I even added a basic primer ring to increase realisim [Any criminal use is NOT to be directed to me.] But, just 3d print if you want to as this is a replica of the round itself!

Ammunition in 30 mm is typically not used against personnel but rather as an anti-material or armor-piercing round. Rounds of this size can be effective against lightly armored vehicles as well as fortified bunkers. It is also a popular caliber for shipboard close-in weapons systems (CIWS), such as the Russian AK-630 and Dutch Goalkeeper CIWS.The Armed Forces of the Russian Federation use their 30 mm weapons in a variety of vehicles, including the Su-25 attack aircraft, Mi-24 helicopter, Mi-28 attack helicopter, Ka-50 attack helicopter, and the BMP-2, BMP-3, and BTR-90 infantry fighting vehicles. The most modern anti-aircraft gun systems in use by Russia are chambered in 30 mm.The U.S. military uses 30 mm weapons in their A-10 Thunderbolt II ground-attack aircraft, AC-130 gunship (AC-130J Ghostrider variant), and AH-64 Apache attack helicopter. It was going to be used in the Expeditionary Fighting Vehicle, until the project was canceled. The United States Navy uses 30 mm weapons on the San Antonio-class amphibious transport dock and on Freedom and Independence-class littoral combat ships as part of the surface warfare (SuW) package.[1][2] In 2012, the Navy decided to replace the Mk 110 57 mm cannons on Zumwalt-class destroyers with the Mk 46 GWS.[3] The United States Coast Guard plans to install 30 mm weapons on the Polar Security Cutter[4]