allow the use of reduced scale pigs, turkeys and rams placed at the same distance as chickens. The scale is reduced proportional to the change in distance, so the targets will cover the same angular distance as they would if set up at full range. Reduced scale matches fired at paper targets are also popular for informal competitions, especially for Internet-based matches where the shooters may reside in different countries. These are generally fired with rimfires or airguns. Targets for large-bore use are thick hardened steel; small bore targets are steel, and airgun targets are steel, although some aluminum targets are produced. Ranges are measured in meters only. The exception is the new IHMSA air pistol discipline, which is in yards only. Handgun categories Both bolt action and break action pistols are common in metallic silhouette shooting, as well as revolvers. Pistols usually either have a center grip or rear grip, and which is favored depends on shooting position and personal preference. Examples of pistols used for metallic silhouette shooting are the Remington XP-100, Thompson/Center Contender, Savage Striker and Tanfoglio Thor. Metallic silhouette handguns most often have iron sights, although there are some national divisions where scope sights are used. Handgun scopes are usually rifle scopes with normal eye relief (especially for the standing position), but sometimes extended eye relief (EER) scopes are used (also called "scout" sights), especially when used for a lying position. All long range handgun metallic silhouette events are fired with targets at the distances 50, 100, 150 and 200 meters. International handgun categories The four international fullbore handgun divisions sanctioned by IMSSU are: Unlimited, Production, Standing, and Revolver. IMSSU Unlimited Iron sighted pistols and revolvers with a maximum barrel length and sight radius of , and a maximum weight of . The sight radius is measured from the rear of the sight blade to the highest portion of the from sight. The overall length of the firearm can no more than . The bullet diameter must be minimum 6 mm (.240"). The shooting position is freestyle, and most opt to shoot lying. The iron sights are usually open, but diopter and hooded sights are also permitted. Muzzle brakes are not permitted. Revolvers are uncommon due to a having a higher degree of difficulty, i.e. longer lock time. Examples of popular handguns for IMSSU Unlimited are the XP-100 and Thompson/Center Contender. IMSSU Production Stock iron sighted