38 Special, preventing the more powerful round from being inserted into the cylinders of the less powerful revolvers. (On the other hand, .38 Special rounds can be loaded into .357 Magnum guns ...

A deluxe model comes with a larger, seven-round cylinder. Ruger GP100 Sturm Ruger’s answer to the Smith & Wesson 686, the Ruger GP100 was introduced in the early 1990s.