25 Winchester Duplex
6.35x48mm (FA-T125)
The 6.35x48mm Duplex Experimental
Cartridge (.25 Winchester) was
designed by Frankford Arsenal and
manufactured by Winchester.
It was one of the experiments in the
mid-1950s and early 1960s by the USA
NATO to develop a new Service Rifle
Cartridge. One of the listed loadings is a
Double Ball, called (FA-T125).
The cartridge was one verison based on
the .25 Remington case,  the (FA-T125)
measured 6.35x48mm and loaded with
two 3.4 g (53 grain) Projectiles firing at
(2,600, front bullet and 2,460, Back bullet)
feet per second .
However, the decision against the .223
was overturned by further trials in 1959,
which again found the AR-15 superior to
the M14 and recommended that its
development should be pursued as a
replacement for the 7.62 mm rifle, which
had only been formally adopted for
service two years before.
$ 24.95 per