Producing her finest performance, the 26-year-old Chandela shot 252.9 to win the top prize on day one of the International Shooting Sport Federation (ISSF) competitions, at the Dr Karni Singh Shooting Range.
China's Ruozhu Zhao bagged silver with 251.8 while another Chinese, Hong Xu (230.4), finished the tournament's first final with a bronze.
Such was Chandela's dominance in the eight-woman final that she finished the event a staggering 1.1 points ahead of the silver medallist.
Chandela, who had secured a Tokyo Olympic quota in the last World Championships, was fourth in the qualifications with 629.3.
Zhao topped the chart with a qualification world record score of 634.
The final witnessed an astonishing display of shooting with Chandela, placed at the bottom to start with and watched by her mother Bindu, leapfrogged the rest of the field to emerge triumphant.
In her own words, the loud cheers from behind helped, as she rallied to grab the second place with a 10.6 in the 11th shot.
The exceptional series of scores continued unabated as she maintained her second position, a 10.8 propping her up at that stage of the final.
The top two Chinese meanwhile interchanged positions even as Chandela shot her way to the top of the pecking order and consolidated her position with a monstrous 10.8 in the 18th shot.
Not one to give up, Xu produced a 10.9 to reduce the gap to 0.1 point.
An unbelievable series of 10.6 10.8 10.6 and another 10.8 ensured the fierce Indian competitor from Jaipur was way ahead of the pack with a difference of 0.8 points.
The 24th and final shot was a 10.5 from Chandela, same as Zhao, but the gap by then had only widened.
Chandela started with a 10.1 and she repeated the score only once over the next 23 shots.
"It's been a bit tough but I have been practising and not giving up. I am glad that I got the result today, there is a lot more to work on. A lot of important competitions ahead, so will look forward to bettering the performance," Chandela said.
This is Chandela's third individual medal at a World Cup. She won bronze in the Changwon World Cup in 2015 before winning silver at the ISSF World Cup Finals in the same year.
After winning gold at the 2014 Commonwealth Games, she had to be contend with a bronze in the last edition of the Games in Gold Coast. At the 2018 Asian Games, she combined with Ravi Kumar to secure a third place finish.
India have already clinched the maximum of two Olympic quota places for the 2020 Tokyo Olympics in this event, but there was no dearth of motivation as Chandela, "pumped up" by a near-packed finals hall, demolished her famed rivals, including a Chinese triumvirate, one after another.
Mehuli Ghosh, who is not part of the Indian team and was shooting in the MQS (Minimum Qualification Scores) category, shot 631, which is the highest by an Indian in the event.
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