5 mm/35 SMc (5mm-35) / 5×39mm SMc is a high performance 5 mm (.20 inch) intermediate cartridge. Designed by Michael McPherson and Byrom SmalleyBiographies . SBI. Accessed March 3, 2007. and like all of their other designs carries the "SMc" designation as well as being patented.
Description SMc cartridges were developed in an attempt to produce an efficient cartridge combining low recoil, low heat, and high velocity.Mission Statement at Superior Ballistics Inc. The 5 mm/35 SMc has produced velocities in excess of shooting a molybdenum disulfide-coated Berger bullet from a Pac-Nor barrel, far higher than its commercial counterpart the .204 Ruger.
Although it is a wildcat cartridge, rifles chambered for 5mm/35 are available from the custom shop at Savage Arms.
The patents for the cartridge are , and .
See also 5.56×45mm .204 Ruger .20 Tactical 5 mm caliber
References
Superior Ballistics