Yeah, Ruger was really proud of how strong the gun was. The manual for the 9mm P85/P89 pistols had a very impressive comment about ammunition.
"The Ruger P-Series pistols are compatible with all factory ammunition loaded to U.S. Industry Standards, including high-velocity and hollow-point loads, loaded in brass, aluminum, or steel cartridge cases. No 9mm x 19, .45 ACP 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."