The RUGER® SR-SERIES pistols are chambered for the 9mm Parabellum
(SR9 and SR9c) or .40 S&W (SR40) cartridges. Do not attempt to load any other
cartridges into the magazine or chamber of the pistol.
The SR-SERIES pistols are compatible with all factory ammunition of the
correct caliber loaded to U.S. Industry Standards, including high-velocity and
hollow-point loads, loaded in brass, aluminum, or steel cartridge cases. No 9mm
Parabellum or .40 S&W ammunition manufactured in accordance with NATO,
U.S., SAAMI, or CIP standards is known to be beyond the design limits or known
not to function in these pistols.