When Hornady rolled out the 6mm ARC (Advanced Rifle Cartridge) in 2020, the shooting community lit up with debate. Some called it a game-changer for the AR-15 platform. Others dismissed it as just another boutique round destined to fade into obscurity. Several years later, the dust has settled enough to ask the real question: is 6mm ARC actually worth the hype, and does it have staying power? Let's break down the ballistics, the practical realities, and the long-term outlook for this cartridge. …