Are 38 S&W vs 38 Special Ammo interchangeable?

The .38 Special and the .38 Smith and Wesson are not interchangeable. .38 Smith and Wesson is larger in diameter than the .38 Special.

Best .38 Special & .357 Magnum Ammo 2024: Self-Defense, Hunting & Range - Pew Pew Tactical

Can You Shoot 357 in a 38? Multi-Caliber Weapons Explained [2022]

Why is 38 special ammo bigger than 38 ammo? - Quora

Can I make a 38-55 casing from a 38 special casing to use in a 38 S&W? - Quora

What's the difference between a .38 vs .38 Special? - Quora

Capable Collectible: S&W Victory Model

38 S&W (The Other .38)

Ammo: What You Want vs. What You Have - The Shooter's Log

Is it dangerous to shoot .38 Special rounds (Not +P) in a .38 S&W