Winchester kept making Military Contract FMJ .303 well into the 1980s.
The 1949 manufacture was probably for Israel, '49 dated examples have been noted in the Middle East, and Indonesia bought a lot of Winchester Military FMJ in .303, 7,92 and .45ACP in the 1950s ( Mostly with the Commercial WRA headstamp (no dates).
Ireland bought WRA .303 in the 1970s and 1980s…some of this has come onto the surplus market in the last 5 years.
Whether this ammo ( Post-war WRA) was made at the New England Plant, or at the Western Plant at East Alton , Illinois, is not certain.
The New England plant/s did dispose of a lot of .303 and 7,92 machinery to Israel in 1946-1950 as a result of “disposal” of GOCO machinery ( Gov’t owned, Contractor operated) from WW II.