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.

38 Super vs .38 Special: A Caliber Comparison

38 S&W - Wikipedia

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38 S&W - Wikipedia

Thirty Eights - American Handgunner

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

Bullets: Sizes, Calibers, and Types [Guide + Videos] - Pew Pew Tactical

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

Charter Arms PROFESSIONAL: Middleweight Contender

De-Mystifying .38 Special Military Loads - American Handgunner

Can a .38 special lever action rifle be modified to shoot 9mm luger? - Quora

The Harrington and Richardson Model 732 Guardsman - A Tale of Two Thirties

Cartidge PETERS 32 WIN SPL