These shot cartridges were commercial products by FM using cases manufactured between 1965 and 1969, and were intended for small game hunting. The latest ad that I have found mentioning these was published on November 1973, but these were also listed in catalogs until c. 1978. As John mentions above, these loads were designated Supervivencia, which in Spanish means "Survival", but known documentation indicates that none of these were adopted for military service.
Standard production included calibers .45 Auto, .44 WCF, 7.62x51, and 7.65x54 Mauser, although test lots were also made in 9 mm Parabellum and .38 Special. The first production in .45 Auto and 7.62x51 was made using plain brass cases, and in 1966 switched to nickeled brass. Known .44 WCF cartridges used nickeled cases only and 7.65x54 Mauser used plain brass (it was also made with a nickeled case but specimens are unknown in collections).
Specifications for the 7.62x51 indicate that it was loaded with 16g of no. 8 shot, velocity at 2m 300 m/s, effective range 15-20m, and shot pattern similar to 32 ga. In the .45 Auto these indicate: 9g of no. 8 shot, velocity at 2m approx. 250 m/s, effective range 10-15m, and shot pattern similar to 36 ga. These specifications were slightly changed during the 1970's.
The warning note on the 7.65x54 box posted by Sergio is a nonsense inherited from the 7.62x51 label and it says: "Under no circumstances use these cartridges in weapons with blank-firing adapters".
Sergio y Claudio, un saludo grande para los dos!