But closing in sharply, especially through rounds five and six - with a clean slate of five in both them - Sidhu was finally able to overhaul the Australian in the seventh, as the two finished with four and two shots.
Annu Raj Singh finished sixth after being eliminated in the second stage of the same event.
Heena, who had already won a silver medal in the women's 10m air pistol event on Sunday, clinched her second medal, improving from her silver. Jitu Rai had also won the gold medal in men's 10m air pistol making it three gold for Indian shooting contingent.
Heena Sidhu, centre, shot a final score of 38, two of them ideal fives, to claim the top honours ahead of Australian Elena Galiabovitch, left.
The result takes India's overall tally to 20 medals, with 11 Gold, 4 silver and 5 bronze.
Heena has made two trips to the CWG in 2010 - winning a gold in the team 10m air pistol event and silver in the individual 10m air pistol - and 2014 where she qualified for the 10m final but failed to leave a mark.
CWG 2018: Heena Sidhu breaks record to clinch 25m pistol gold medal
Sidhu created the record when she shot a total of 38. And reflecting on her success, Sidhu placing her hand on her first gold medal in three editions, said, "I am really feeling good, this being my first medal in this event". The simulation of disturbances during training finally helped her maintain steely nerves.
Boxing star Mary Kom would be aiming to enter the finals, while star shuttler Saina Nehwal and P V Sindhu will begin their quest for individual medals after the mixed team gold. India will now take on England in their last group encounter. Dominating the 53 kg event, another Manipuri girl got India their second gold medal.
Earlier in the day, Chain Singh and Gagan Narang disappointed in 50m Rifle Prone Men's Shooting Finals. Annu finished the qualification stage at the second spot with a total of 584 points.
It was the same again today as she had to claw her way back from a risky position but ended up dominating the field in the 25m Pistol round to score 38 - a new Commonwealth Games Record.
In men's hockey, India came up with an inspiring performance against Malaysia to beat their Asian rivals 2-1 and qualify for the semi-final.
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"Mr Xi set out his defence of globalization at the World Economic Forum in Davos a year ago ", Bloomberg news said Sunday. According to the BFA Charter, Zhou is ex-officio member of the Board of Directors and vice chair of BFA.
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