If they're built on an Ishapore action, they'll do fine.
The Ishapore variants used a different steel and heat treat method to handle the 7.62mm NATO round, and were issued as such.
They're the ones with the squared-off magazine bottoms. Dunno how plentiful they are anymore, though.
The Jungle Carbines made on the Ishapore 7.62mm NATO actions should have plenty of strength.