38-40 Revolver Ammo

Shop .38-40 Revolver Ammo – Vintage Caliber, Frontier Legacy

Explore .38-40 Winchester (10.17x33mmR) revolver ammunition at SGAmmo—your trusted source for classic pistol cartridges offered at competitive prices. Whether you're a cowboy action enthusiast, a vintage revolver aficionado, or simply drawn to firearms with storied pasts, this cartridge speaks to a heritage that shaped the Old West.

Introduced in 1874 for the Winchester Model 1873 lever-action rifle, the .38-40 WCF was named despite firing a true .40-caliber (0.401˝) bullet—a quirk that has been part of its charm for over a century. Though it originated in a rifle, the round found a place in large-frame revolvers such as Colt’s Single Action Army and New Service—trusted for its manageable recoil and respectable performance at close ranges.

Everything listed here ships quickly and securely—straight from our warehouse to your door. At SGAmmo, we value the preservation of historical calibers, offering dependable service and fair pricing for beloved vintage ammunition. Whether you're reloading for a cowboy match or keeping a piece of frontier history in working condition, now’s the right time to secure your supply of .38-40 WCF revolver ammo with confidence!