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.

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

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

Can You Chamber .38 Smith and Wesson Ammo in a .38 Special Revolver?

38 Special vs 357: The Wheel Gun Shootout

Thirty Eights - American Handgunner

38 Special vs 357: The Wheel Gun Shootout

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

TFB Round Table: Anything Special About 38 Smith & Wesson?The Firearm Blog

357 Magnum vs .38 Special

Fightin' Iron: The Terrier An Official Journal Of The NRA

38 S&W - Wikipedia

357 Magnum vs. .38 Special

38 S&W vs. 38 Special

The .38 Smith & Wesson: History And Performance

38 Special vs .38 Super - Caliber Comparison