Complex sentence: The later M19/M19A1 box (1946 to 1953/1954 to Present) that replaced it held 250 linked rounds of.30-06 ammunition or 220 linked rounds of 7.62mm NATO ammo (the round that replaced the.30-06 Springfield in 1957).
Split into simpler sentences: The later M19/M19A1 box (1946 to 1953/1954 to Present) that replaced it held 250 linked rounds of.30-06 ammunition. It could also hold 220 linked rounds of 7.62mm NATO ammo (the round that replaced the.30-06 Springfield in 1957).