Hello,
The S&W called K.38-200 were made specially for british troops during WWII.
The 38-200 bullet (or 380 MkII) have a diameter between .354(jacketted bullet) and .362(Lead bullet)
The .38 spécial bullet diam. is .350
I have seen many K38-200 rechambered to 38 spécial. The pistol is strong enough to support
such operation.