28 grams (432 grains). For comparison, a common deer-hunting rifle round is a 7.62 mm (.308 inch) slug weighing 9.7 grams (150 grains), but the dynamics of the rifle cartridge allow for a different type of wound, and a much further reach. Shotguns are often used with rifled barrels in locations where it is not lawful to hunt with a rifle. Typically, a sabot slug is used in these barrels for maximum accuracy and performance. Shotguns are often used to hunt whitetail deer in the thick brush and briers of the Southeastern and upper Midwestern United States, where, due to the dense cover, ranges tend to be close – 25m or less. Sabot slugs are essentially very large hollow point bullets, and are streamlined for maximum spin and accuracy when shot through a rifled barrel. They have greater ranges than older Foster and Brenneke-type slugs. People often use semiautomatic or pump-action shotguns for hunting waterfowl to small game. Law enforcement In the US and Canada, shotguns are widely used as a support weapon by police forces. One of the rationales for issuing shotguns is that, even without much training, an officer will probably be able to hit targets at close to intermediate range, due to the "spreading" effect of buckshot. This is largely a myth, as the spread of buckshot at 25 feet averages 8 inches, which is still very capable of missing a target. Some police forces are replacing shotguns in this role with carbine rifles such as AR-15s. Shotguns are also used in roadblock situations, where police are blocking a highway to search cars for suspects. In the US, law enforcement agencies often use riot shotguns, especially for crowd and riot control where they may be loaded with less-lethal rounds such as rubber bullets or bean bags. Shotguns are also often used as breaching devices to defeat locks. Military Shotguns are common weapons in military use, particularly for special purposes. Shotguns are found aboard naval vessels for shipboard security, because the weapon is very effective at close range as a way of repelling enemy boarding parties. In a naval setting, stainless steel shotguns are often used, because regular steel is more prone to corrosion in the marine environment. Shotguns are also used by military police units. U.S. Marines have used shotguns since their inception at the squad level, often in the hands of NCOs, while the U.S. Army