Russia's Lioubov Galkina set an Olympic record as she claimed gold in the women's 50m rifle three positions on Friday.
Galkina, who also won silver in the 10 metre air rifle, fired 101.4 points in the final round to set the record.
In total the Russian scored 688.4 points to finish well clear of Italy's Valentina Turisini.
In the men's 50 metre rifle prone Matthew Emmons of the US won gold from Christian Lusch and Sergei Martynov.
In the women's three position event silver medallist Turisini finished with 685.9, just ahead of China's Wang Chengyi, who claimed the bronze with 685.4.
Olga Dovgun of Kazakhstan had led the field after the qualifying with a score of 588, one point ahead of Galkina.
But Dovgun then produced the worst round of any of the eight finalists, getting just 96.9 points, to end up fourth.
Galkina, 31, had just missed winning the first gold medal of the Olympics last Saturday, faltering on her final shot to hand victory to China's Du Li in the 10 metre event.
In the men's prone event Emmons was the leading qualifier with a score of 599.
That means only one of his 60 shots failed to hit the bull's-eye, which is just 10.4mm in diameter.
In the final, where shots are measured in fractions of a point, Emmons shot 104.3.
Martynov had the highest score in the final, shooting 105.6 to vault himself into a podium position after finishing fifth in qualifying.
Emmons qualified for three events at the Athens.
He just failed to reach the final in the 10 metre air rifle Monday and will compete in three-position rifle on Sunday.