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Monolithic bullets are solid metal bullets that do not have a jacket. They are instead a solid block of metal, typically copper or a copper-zinc brass alloy, although historically any bullet made of a single type of metal can be referred to as a monolithic bullet.〔http://www.gunsmagazine.com/monolithic-bullets/〕 Monolithic bullets depart quite dramatically from the better known lead- or jacketed bullet, and offer a more environmentally friendly alternative to the toxicity associated with lead bullets. As a result of increasing environmental concerns over the toxicity levels found in lead-based bullets, some areas in the United States of America have banned the use of lead bullets for hunting purposes.〔http://www.dfg.ca.gov/wildlife/hunting/lead-free/〕 This increasing awareness of the dangers of lead bullets has led to the development of the modern monolithic bullet, which now provides a viable and accurate alternative to the use of lead for shooting. == Differences between lead and monolithic bullets == Besides the fact that monolithic bullets are entirely non-toxic to the environment, humans and animals, there are a number of additional differences between traditional lead bullets and modern day monolithic bullets 〔http://www.peregrinebullets.com〕 * Monolithic bullets retain their weight and shape far better than lead bullets. Lead bullets often break apart once they hit their intended target (if traveling at high velocities) which implies greater meat damage to the hunted animal. Lead bullets are also less kinetically efficient (and therefor, less lethal) at energy delivered to the target. This makes well manufactured monolithic bullets preferable for hunting purposes. * Monolithic bullets are lighter in weight than lead bullets. As a result, monolithic bullets are able to achieve or exceed the velocities of lead- or jacketed bullets at the correct powder loads. * Lead is a much denser material than copper. Lead also tends to mould itself better to the shape of the barrel, whilst monolithic copper bullets tend to retain their shape in the barrel.〔http://gunsmagazine.com/monolithic-bullets/〕 Due to the soft nature of the copper in monolithic bullets, copper barrel fouling has been a concern amongst hunters in the past. New generation monolithic bullets, such as those manufactured by Peregrine Bullets in South Africa, are designed in such a way that copper fouling is no longer a concern. * Accuracy achieved when using monolithic bullets is much higher than accuracy obtained by using lead bullets. This is due to the precision manufacturing process of monolithic bullets. * Lead bullets are typically more affordable and easier to manufacture than monolithic bullets. Quality monolithic bullets need to be put through a process of precision manufacturing of very tight tolerances in order to achieve high levels of accuracy. This makes the bullet more expensive, but also more effective than lead bullets. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Monolithic bullet」の詳細全文を読む スポンサード リンク
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