Gunner's Bible pdf epub mobi txt 電子書 下載 2024


Gunner's Bible

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发表于2024-12-25

Gunner's Bible epub 下載 mobi 下載 pdf 下載 txt 電子書 下載 2024

Gunner's Bible epub 下載 mobi 下載 pdf 下載 txt 電子書 下載 2024

Gunner's Bible pdf epub mobi txt 電子書 下載 2024



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Daily practice with a given gun over a period<br >of several weeks will make you a better than<br >average marksman, at least with that particular<br >gun. Some pistol coaches even require that team<br >members fire only every other day to avoid<br >going stale. The fact remains that, whether you<br >shoot daily or only every second day, you ll<br >develop some degree of skill which can t be<br >matched by a shooter who fires only occasionally.<br >This skill will come to you even ff you don t<br >grasp what goes on within a firearm when you<br >shoot it.<br > However, if you ll combine consistent prac-<br >tice habits with some understanding of ballistics<br >-the science of projectiles-you ll become truly<br >expert in less time and your shooting fun will be<br >multiplied hundredfold. When you understand<br >the "why" of shooting, the "how" becomes<br >Caliber<br > "Caliber" is the term applied to the interior<br >diameter of a rifle or pistol barrel or to the di-<br >ameter of a bullet. In English-speaking coun-<br >tries this is indicated in hundredths or thou-<br >sandths of an inch (.30) or (.308),<br > Sometimes caliber indicates ,bore diameter-<br >that is, measurements made from the top ,of the<br >lands or raised surfaces between the rifling<br >grooves within a barrel. A typical example of<br >this is the .30 Remington which, ff measurements<br >were made from the bottom of the rifling<br >grooves, would be .308. The same is true of<br >other .30 calibers irrespective of manufacturer<br >and what it boils down to is that a .30 caliber<br >is actually .308 inches in diameterl<br > Many .30 caliber loads exist, of course, in-<br >eluding the .30/30, ,30/06 Springfield, .300 Hol-<br >land & Holland, .300 Savage, .308 Winchester,<br >and others. Bullets for these loads may be in-<br >terchangeable since they all use projectiles .308<br >inches in diameter, but the cartridges themselves<br >may be fired only in rifles specifically designed<br >for particular loads due to variations in the shape<br >and powder capacity of the shells. In other<br >words, a .30/06 cartridge cannot be fired in a<br >.30/30 rifle-even if both are .30 caliber.<br > Even the date of original issue is sometimes<br >included in caliber designation as is the case with<br >the .30/06 Springfield. The ".30," of course, in-<br >dicates bore diameter. The "06" is an abbre-<br >viation of the year (1906) during which the<br >load was issued to the U. S. Army and "Spring-<br >field" is the name of the rifle, taken from the<br >armory where the guns were manufactured. The<br >Rock Island Armory also turned out these weap-<br >ons.<br > Often, too, commercial developers of car-<br >tridges have given their names to calibers so<br >that the latter have become household words<br >among shooters. Among these are the .30 Rem-<br >ington, .270 Winchester, .300 Savage and .300<br >Holland & Holland.<br > Calibers originating in countries where the<br >metric system of measurement prevails are likely<br >to be indicated in millimeters. The 8/57 R mm,<br >for example, has an 8-millimeter-diameter bul-<br >let. The second figure, 57, is the length of the<br >cartridge case or shell given in millimeters while<br >the "R" is applied, to a shell whose base is<br >rimmed. Fore i~m e~libers are also associated<br >with their originatorsl~y adding the latter s name,<br >as is the case with tl~ 8 mm Mauser.<br > The confusion of calibers carries into the pistol<br >field, too. The .38 Special fires a bullet .357<br >inches in diameter so that,<br >.35! Confusion was further<br >in reality, the .<br ><br >

Gunner's Bible 下載 mobi epub pdf txt 電子書

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Gunner's Bible pdf epub mobi txt 電子書 下載
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