What is the RHA penetration capability of this round??
From the article you quoted :
The OFB has recently finished supplying over 10,000 tank shells with 460mm piercing capacity. In a bid to continue getting indents, it has now come up with shells having piercing capacity of much beyond 500mm, said sources. Internal trials have been completed over a month ago and the product would be put up before the Army for its final appraisal. The production process takes place in ordnance factories across Vidarbha too.