15-091 Garand Picture of the Day - Expermental Duplex cartridge of "22-06".
https://www.milsurps.com/images/impo...43SCU22L-1.jpg
example of a late 1950's production, experimental M1 Garand rifle chambered in the experimental Duplex cartridge of "22-06".
https://www.milsurps.com/images/impo...NH43RF1L-1.jpg
https://www.milsurps.com/images/impo.../03/SAL2-1.jpg
calibers of the SALVO II test: From left to right, Cal .30 Ball M2, Cal .30 short neck Triplex, Cal .30 short neck Duplex, Cal .22/.30 short-necked Simplex, Cal .22/30 long-necked Duplex, AAI flechette shotshell. Image source: Ray Meketa, from forums.gunboards.com
