50 metre rifle prone is an International Shooting Sport Federation event consisting of 60 shots from the prone position with a .22 Long Rifle (5.6 mm) caliber rifle. The time limit is 75 minutes for the entire match, including sighting shots, or 90 minutes if there is a need to compensate for slow scoring systems. In the 2013 ISSF rules the 60-shot prone match consists of 15-minute preparation and sighting time, followed by the match - 60 shots in 50 minutes for electronic scoring, and 60 shots in 60 minutes for paper targets.
The sport is based on the traditional "English Match" that also consisted of 60 shots in the prone position with a .22 rifle, but had varying distances between 45.7 metres (50.0 yd) and 100 metres (110 yd).
Only the men's event is included on the Olympic program and thus includes a final for the top eight competitors. Beginning with the 2013 season, a new finals format was instituted, in which the qualification score is discarded, and the standings among the top eight shooters are determined by their finals scores alone. The course of fire was also changed significantly with the new rules, from the previous 10-shot program into a 20-shot elimination format, with the lowest ranking shooter eliminated every two shots, starting from the 8th shot.
The women's event is not Olympic but included in both the ISSF and the CISM World Championships. As there is no final, shooters with the same score are separated by a number of tie-breaking criteria, the first being the number of inner tens. Women's rifles may weigh up to 6.5 kilograms (14 lb), as opposed to 8.0 kilograms (17.6 lb) for men, but after the switch from standard rifles to sport rifles this is now the only difference in equipment.