extra warmth when conditions require. Many shooters prefer to have their own personal timer to show a countdown of the remaining time of a shooting period. To aid in sight adjustment, many use a notebook or other aid to show an overview of relevant ballistics. Any tools needed for sight adjustment should be brought along. Elbow pads are commonly used to reduce impact to the elbows against the ground and recoil. A leg garther is often used to store ammunition, and a blast shield (also called leg shield) is normally used, especially for revolver shooters due to the blast from the revolver cylinder. A carrier box or shooting box can be of great help for convenient transporting of the firearm from station to station on the range. Clothing such as commercial-type trap and skeet vests (sleeveless) and shotgun shooting shirts are permitted as well as clothing normally suitable for existing climatic temperatures. Shooting coats, unnecessarily heavy clothing, or anything that would provide artificial support such as clothing having excess padding or stiffening material or which restricts or supports the body in the shooting position may not be worn. In black powder cartridge rifle competitions only period costumes are permitted. See also Bowling pin shooting Field target, similar sport for air guns References External links International Metallic Silhouette Shooting Union 2017 IMSSU Official Sporting Rules The National Rifle Association page, U.S. member association of IMSSU, also covering NRA rifle and pistol silhouette shooting. NRA Pistol Silhouette Rules, National Rifle Association of America NRA Rifle Silhouette Rules, National Rifle Association of America The International Handgun Metallic Silhouette Association (IHMSA) homepage The IHMSA 2009 Rulebook Shooting sports