<P> The manufacturing process of hollow - point bullets also produces a flat, uniformly - shaped base on the bullet which allegedly increases accuracy by providing a more consistent piston surface for the expanding gases of the cartridge . </P> <P> Match or target hollow - point bullets are designed for precision target use, and no consideration is given to their expansion or other terminal ballistic performance . The United States military claims to use hollow - point bullets in some sniper rifles for their exceptional accuracy at long ranges, and claim that the hollow - point does not result in wounds significantly different from full metal jacket ammunition in practice . </P> <P> A hollow - point boat - tail bullet is a match - grade bullet design that uses the concept of a teardrop - shaped tail to give it a lower drag coefficient and make it produce less turbulence in its wake . Only the base of the bullet has a boat tail - like shape--the meplat is still pointed . Some hollow - point boat - tail bullets with longer, more aerodynamic profiles are known as very - low - drag bullets . </P> <P> Terminal ballistics 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 factors are interpreted depends on the intended use of the bullet, and there are no universally agreed - upon ideal metrics . </P>

What is a boat tail hollow point bullet
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