Great Britain's Peter Wilson narrowly missed out on a place in the final of the double trap at the ISSF World Cup.
The 25-year-old world record-holder and current world number one is British shooting's best chance of medal success at this summer's Olympic Games.
But a first-round 43 out of 50 proved costly and a combined three-round total of 138 was one shot short of securing a place in the final, leaving him in seventh place.
Wilson, from Dorset, was competing for the first time at the Royal Artillery Barracks in Woolwich, which will also be the venue for the shooting at the Games.
Team-mate Richard Faulds, who won Britain's last Olympic shooting medal when he took gold at Sydney 2000, finished 31st with a total of 128.
The 35-year-old, hoping to compete at his fifth Olympic Games this summer, was one place ahead of fellow Brit Stevan Walton.
The final was won by Mikhail Leybo of Russia after a gold medal shoot-off with Italy's Francesco D'Aniello.
There was some good news for Britain, with Jonathan Hammond coming through his eliminator in the 50m rifle prone.
The 31-year-old Scot, who lives in West Virginia where he coaches at the University, faces another qualifier on Tuesday as he attempts to become the first Brit to reach a final at the event.