Okay, I think I can clear up some of this muddy water. India has a long history of defective firearms. These bad guns were imported by Indian rebels from the Khyber Pass.
This mountain pass runs between Pakistan and Afghanistan. It dates back to the days of when India was a British colony.
Tribal gunsmiths of the Khyber Pass would, and still do, duplicate British firearms, and later Russian, using whatever scrap metal may be laying about. Making copies of Snider rifles to modern day AK-74's!
Poor metalurgy and improper, if any, heat treatment, made these guns time bombs.
I remember reading of one instance, where they chopped up reels of celluloid movie film stock to use as powder in their cartridges. They had poor results with that.
More on Khyber Pass Copies on wikipedia
Many of these same "gunsmiths" now reside in modern day India, having been displaced by the Russian incursion into Afghanistan, and the Talaband fighting of today.
I have seen more than a few of these guns, from 12 feet away, you cannot tell its a counterfeit. Upon closer inspection, you will see the file marks and mis-spelling in the stamps that are telltale signs of these guns.
I, once, had a copy of a SMLE oiler, made in the Khyber Pass. Outside, it could easily pass, inside was crude cast and its leaks were sealed with lead.
For more information, do a Google search with the keywords -
khyber pass gunsmiths
You get what you pay for.
And just a heads up, I was talking with John Buck yesterday, and he made the remark about needing to drum up some more work.