The Indian Ammo problem was a result from the good old H.M.Government trying to save a few pennies.
They though by buying in a few Million rounds of Indy 9mm they would make a good killing for cheap training.
In the end, as a few member discovered whilst using it. The pressures varied hugely, & accuracy suffered as well as reliability issues.
I had seperated cases (Ruptured cartridges) some virtually spitting out the muzzle & dropping 8-10 feet in front of me!
Occasonaly, you would get a runaway gun. IE: The sub machine gun would continue to fire full auto without your finger on the trigger!
This was due to weak chamber pressures failing to generate enough gas to blow the Breech block back far enough to engage on the sear. It blew it back , but it was only going back as far as JUST in front of the sear.!
VERY disconcerting to say the least!
In the end, it was policy to only fire Indy 9mm in Browning pistols.
These worked from a closed & locked breech mech that was stronger & therefore safe to fire. In any event sometimes it blew the side back & functioned, sometimes it did not. This was obviously totaly unacceptable & eventualy it was all withdrawn & sea dumped. (In the days when ammo, guns, & weapon spares were allowed to be sea dumped!)
Mike. :coffee: