The 26-year-old Chain upstaged his senior team-mate Gagan Narang to win the men's 10m air rifle event with a total score of 204.6 to add to his 50m rifle prone event gold he had bagged yesterday at the Kahilipara Shooting Range.
Gagan, who had won a bronze in this event in 2012 London Olympics, had to be content with a bronze. He had also lost the gold to Chain in the 50m rifle prone event yesterday.
One of the six Olympic quota holding shooters taking part in the SAG, Chain said he will have to improve upon his score in the run up to the Rio Games if he has to do well in the Brazilian capital.
"I won a gold, for that I am happy. But the score is not good and so I am not happy in that front. So, I would say it is not a great win. The score you can see is not of world standard. I will not get anything in a top world event with this kind of score," he said after the event.
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Chain said that he plans to compete in all the four World Cup legs and a few trials in the run-up to the Olympics.
The trio of Chain, Narang and Imran Khan won the gold in the team event with a total score of 1863.4, while Bangladesh (1845.8) and Sri Lanka (1827.2) bagged the silver and bronze respectively.
In the men's individual 20m standard pistol event, Indians ran away with all the medals on offer. Neeraj Kumar bagged the gold with a total shot of 569 while compatriots Gurpreet Singh (566) and Mahender Singh (563) took the silver and bronze respectively.