U.S. Army specifications for the new cartridge mandated the caliber to be greater than .27, with an effective range of 300 yards or more, and a midrange trajectory ordinate of 18 inches (460 mm) or less at 300 yards. With these requirements in hand, Winchester’s Edwin Pugsley chose to design the cartridge with a .30 caliber, 100–120 grain bullet at a velocity of 2,000 feet per second (610 m/s). The first cartridges were made by turning down rims on .32SL cases and loading with .308 caliber bullets which had a similar profile to that of the U.S. military .45 ACP bullet. [color=#BF0000]The first 100,000 cartridges manufactured were headstamped “.30 SL”.
[/color]Does anybody have one of these cartridges to show the headstamp?