all field target classes although the PCP shooters will typically outscore the piston shooters. UK rules In the United Kingdom rules, competitors aim to shoot the small "kill" zone that forms part of a larger metal faceplate. These face plates are often shaped to resemble small game animals, although there is currently a move towards simple geometric shapes. On most competition targets, the kill zone forms the end of a short lever that tips the faceplate backwards when successfully hit. These targets have to be reset by tugging on a length of cord attached to the faceplate above the hinge. Targets are shot from open "gates" in a firing line, and are divided into "lanes" of two targets each. Many competitions impose a time restriction of two minutes to shoot both targets after a competitor first looks through his or her sights. Targets may be placed at any distance between 10 yards (9 m) and 55 yards (50.3 m) from the firing line. Targets are often placed at about the same height as the shooter, but it is not uncommon for them to appear high up banks or in trees, or down steep slopes. The hit or "kill" zone of a target is always circular, and nominally 40 mm in diameter, although "reducer" targets as small as 25 mm diameter may be employed for seated shots up to 35 yards (32 m).15 mm kill zones at close range are also becoming popular. The targets are painted with the kill a contrasting color to aid visibility, although the paint is quickly removed by hits during competitions, making it harder to distinguish. The majority of shots may be taken in any stance, but the seated position is the most popular due to its stability and often the need to see over logs or long grass that would preclude prone shooting. Most competitors carry a small beanbag or cushion to sit on while shooting and they are often used as a protective rest for guns while competitors wait their turn to shoot. In competition, 20% of the lanes are designated as compulsory standing or kneeling, and there must be as even a split as possible between the two. Most competitions have 40 targets arranged in 20 lanes, so it is usual to have 2 standing lanes and 2 kneeling lanes. Grand Prix events have 25 lanes, so there are 2 lanes of one