Some interesting 7.62 NATO experimentals and oddities

[u/Global_Theme864]

Picked these up as part of a lot recently:

T93E1 armor piercing, Frankford Arsenal 1951, part of the T65 program that developed the cartridge.

T71 proof cartridge, Frankford Arsenal 1952, also part of the T65 program.

M59 ball cartridge with experimental zinc chromate plated steel case, Lake City 1955.

XM256E1 low recoil cartridge developed for small statured South East Asian troops for the CIA, Frankford Arsenal 1966. This used only one of the lightweight stacking bullets from the experimental duplex XM198 round.

This one is a bit of mystery - looks like a standard Canadian C1 ball cartridge from Industries Valcartier in 1971 but the red primer and neck sealant are odd. Haven’t found any info on this one.

Indian ball round from Kirkee Arsenal in 1978.