.38 vs .38 Special: Key Differences Every Shooter Must Know
.38 refers to the bullet diameter—.357 inches—shared by many cartridges. .38 Special is one specific, rimmed revolver round launched in 1898; it is longer, brass-cased, and loaded to modern pressure specs. The short label is incomplete without “Special.”
Shoppers see “.38” on boxes and assume it covers every .38-caliber round, from .38 S&W to .38 Super. Gun-counter shorthand and vintage revolvers marked only “.38” fuel the mix-up, turning a size label into a cartridge name.
Key Differences
.38 is a caliber label; .38 Special is a distinct cartridge. The Special case measures 1.155 inches, holds 2.6–3.2 grains of powder, and delivers 200–300 ft-lbs. Other .38s—.38 Short Colt, .38 S&W—are shorter and weaker. Only .38 Special fits modern .38 Special or .357 Magnum chambers.
Which One Should You Choose?
Choose .38 Special for everyday revolver carry or training; ammo is abundant and recoils mildly. Skip generic “.38” boxes unless the revolver is clearly stamped “.38 Special.” Match the cartridge to the firearm’s chamber length and name—never guess.
Can I fire .38 Special in a .357 Magnum?
Yes. .357 Magnum chambers are longer and accept the shorter .38 Special safely.
Is .38 S&W the same as .38 Special?
No. .38 S&W is shorter, fatter, and lower-pressure. They are not interchangeable.
Why do some revolvers say .38 but take .38 Special?
Early marketing shortened the name. Check the barrel or frame for “.38 Special” to confirm.