Just two days ago, Pejcic won the gold medal in the 10m air rifle women's competition.
With the latest medal she has confirmed to be in great condition after winning the silver medal in the small calibre rifle last year in Spain, which made her the first Croatian athlete to have secured her way to the Olympic Games in Rio in 2016.
"This is the first time in my career that I have won two gold medals in a World Cup competition. I feel relieved having met the Olympic norm. I can now concentrate on my performance without any pressure," she said after her victory in Changwon.
Pejcic was way ahead of her rivals and ended the competition with 463 rounds, setting a new world record and beating the former best result of all time of 462.7 rounds, set by Italy's Petra Zublasnig in 2014.