The 25-year-old had gone into the competition in her preferred event looking to put her bad luck in Saturday’s 10m rifle competition behind her.
Then she finished in 15th place on Saturday despite a mechanical malfunction which was quickly fixed when dad Donald came to the rescue.
“I couldn’t get the bolt open to load the next shot so my dad ended up taking the rifle and running down the tunnel to take it to the service bay so thanks to him and the service people for managing to fix it,” she said.
“I knew I had 19 shots left to fire and was counting down all the time. If I had 20 or even 15 minutes that would be enough time so I was just waiting for him to come back.”
After her valiant effort the Commonwealth Games medallist scored 414.7 after four series which was not quite enough to qualify for the final with the top eight scoring 415.9 or higher.
Team leader Phil Scanlan said: “Today was a great start for the team. It is good for the whole team to see that we have had a problem, we have dealt with the problem and actually Jen dealt with it very well.
“I actually think it will stand her in good stead ahead of her next match having coped with that and actually done so well, it hopefully will work in her favour.”
Jen, daughter of four-times Commonwealth Games medallist Shirley McIntosh, won 50m Rifle 3 Positions competition silver at the Glasgow 2014 Commonwealth Games where she also picked up bronze in the 50m rifle (prone).
Adding that to her two golds and a bronze in the 2010 Commonwealth Games makes Jen the most decorated female medal winner in Scottish history.