The 7.62MM M198 (multi ball) was a short lived cartridge. But, even during it’s short existence it spawned at least one offspring, the Low Recoil XM 256, and a lot of questions.
Maybe someone can tell me:
When was the M198 officially adopted?
Was the M198 a NATO cartridge?
Has anyone ever seen an FA M198 with the NATO (+)?
Those 3 questions will do as starters.