value as the rings approach the center of the target. 2013 to 2018 finals rules In November 2012, The ISSF announced other finals rules. This finals rules had the best eight shooters starting from zero, eliminating the qualification scores that used to be combined with the finals scores for competition results. The format consisted of 20 finals shots scored in 0.1 point value as the rings approach the center of the target, setting the highest possible 20 shots score at 218.0 points. 2018 finals rules Since 2018 the ISSF finals rules rank the eight best shooters starting from zero, eliminating the qualification scores. The format consists of 2 series of 5 shots each, to be fired within 250 seconds per series. This is followed by 14 single shots each fired on command with 50 seconds for each shot. Eliminations of the lowest scoring finalists begin after the tenth shot (series + first 2 single shots) and continue after every two shots, until the gold and silver medalists are decided. There is a total of 24 finals shots, setting the highest possible 24 shots score at 261.6 points. If there is a tie for the lowest ranking athlete to be eliminated, the tied athletes will fire additional tie-breaking single shots until the tie is broken. Equipment For the 10 meter air rifle and air pistol disciplines, match-grade diabolo pellets are used. These pellets are wadcutter, meaning the pellet head is nearly completely flat, which leaves smooth-edged round holes in paper targets and allows easy gauging for scoring. Match pellets are offered in tins and more elaborate packagings that avoid deformation and other damage that could impair their uniformity. Match air rifle shooters are encouraged to perform shooting group tests with their gun clamped in a machine rest to establish which particular match pellet type performs best for their particular air gun. To facilitate maximum performance out of various air guns the leading match pellet manufacturers produce pellets with graduated "head sizes", which means the pellets are offered with front diameters from up to . However at higher and top competitive levels, even these variations are thought too coarse-grained and match pellets are batch-tested; that is, the specific gun is mounted in a machine rest test rig and pellets from a specific production run on a specific machine with the same ingredients fed into the process (a batch) are test-fired through the