Two centuries old and still in production. The .45 Automatic Colt Pistol cartridge predates the GLMZ, the corponations, the BCI revolution, and most of the cities the round has been fired in. By 2211 it survives largely as a heritage cartridge — the load you buy when your sidearm was designed before the Lake Michigan Reclamation Accords made lead-core projectiles a regulatory headache. It still uses a lead-core full-metal-jacket projectile, which is why it's priced higher than its modern descendant .45 Auto Composite and why most jurisdictions require a Tier 2 collector / heritage license to carry more than a single magazine of it on the street. What you're paying for is fidelity. The pressure curve, the recoil impulse, the report — same as the round was when the original 2011 Smith & Wesson Governor was rolling off the line. Gunsmiths can chamber a Bicentennial Edition for either .45 ACP or .45 Auto Composite without modification; collectors who can afford it choose ACP because the gun was designed around it.