Originally Posted by DCWilson

The "U.S Service Ctg" does not mean .38 S&W; it refers to the .38 Colt round that the government adopted a few years earlier and found too light for reliable military purposes in some Philippine encounters. The .38 Special is in essence a longer version of the same cartridge. Within a few years the .38 Special became standard for both companies, and the Colt round became history.