Here are the benefits of a hollow-point opposed to a full metal jacket round.... #EachOneTeachOne When the bullet strikes a soft target the pressure created in the pit forces the material (usually lead) around the inside edge to expand outward, increasing the axial diameter of the projectile as it passes through. This process is commonly referred to as mushrooming, because the resulting shape, a widened, rounded nose on top of a cylinderical base, sometimes resembles a mushroom. The greater frontal surface area of the expanded bullet limits penetration into the target, and causes more tissue damage along the wound path. Many hollow point bullets, especially those intended for use at high velocity, are partially jacketed, that is, a portion of the lead bullet wrapped in a thin layer of harder metal, such as copper or mild steel. This jacket provides additional strength to the bullet, and can help prevent the bullet from leaving deposits of metal inside the bore. In controlled expansion bullets, the jacket helps to prevent the bullet from breaking apart. A fragmented bullet will generally not penetrate to the desired depth. Terminal ballistics (HOW WELL A BULLET COULD POTENTIALLY KILL A TARGET) testing of hollow point bullets is generally performed in ballistic gelatin, or some other medium intended to simulate tissue and cause a hollow point bullet to expand. Test results are generally given in terms of expanded diameter, penetration depth, and weight retention. Expanded diameter is an indication of the size of the wound cavity, penetration depth shows if vital organs could be reached by the bullet, and weight retention indicates how much of the bullet mass fragmented and separated from the main body of the bullet. How these different factors are interpreted is subject to to intended use of the bullet, and what constitutes good or bad performance is subject to disagreement.
Posted on: Tue, 04 Mar 2014 12:40:20 +0000
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