What prompted a change from Federal to Remington? Economics? The top box is from 1965.
Unlike Match ammunition for rifles, there’s not a whole lot that can be done to 45 ACP to make one lot better than another. Most regular production “hardball” ammunition will shoot better than the average shooter. Before the war, Frankford simply took selected lots from service production and sometimes repacked it and sometimes not. When the National Matches resumed after the KW the majority of the 45 ACP Match ammo was provided by the commercial manufacturers on contract. Most will be by Remington, Federal, and W-W. Today, there is no government support of the matches and shooters provide their own.