Читать книгу The Gun Digest Book of .22 Rimfire. Rifles·Pistols·Ammunition онлайн

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As a result of their using larger charges of slower burning powders, some of the hyper velocity loads in 22 LR suffer a greater loss than do ordinary cartridges when fired in handguns. This effect is even greater in 22 WMR and 17 HMR calibers which need longer barrels to allow the powder charges to burn efficiently. In a handgun with a 6-inch barrel, the 40-grain 22 WMR bullet that is driven to about 1,900 ft/sec in a rifle achieves only approximately 1,450 to 1,500 ft/sec which generates an energy of almost 200 ft lbs. Although energy this high does not make a 22 WMR handgun a better choice than most centerfire calibers for defensive uses, it is more effective than a 22 LR, 25 Auto, and some other lowpowered calibers. While they cannot fire ammunition of any other caliber or accept another cylinder, there are several double-action revolvers available in 17 HMR caliber. With cylinder swapping options that exist for some single-action revolvers, a handgun in 17 HMR could use a cylinder chambered for the shorter 17 Mach 2 if one exists as an option. The 2005 Ruger catalog lists the 17 HMR/17 Mach 2 combination for the Single Six Hunter.