I would like to have information on the ammunition present in my collection.
According to History of Modern U.S. Military Small Arms Ammunition, Vol. 1: 1880 - 1939-
Cal. 50 BMG, F A = Frankford Arsenal, cartridge case produced in 1927. Probably a ball round with M1923 bullet (gilding metal jacket, steel core, boattail, 791 grs), 1927 revision which added the knurled crimping cannelure visible on your cartridge at the neck line. Total production for the M1923 ball cartridge at Frankford Arsenal during this time frame was 433,700 rounds in 31 lots.
THIS HEADSTAMP DESIGN, CAL 50 & FA FOLLOWED BY THE YEAR DATE, WAS FIRST USED BY FRANKFORD ARSENAL IN 1926 AND CONTINUED UP TO THE START OF WWII.
It was written on the case in the pencil T2E3 ?