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Download - Hornady

Download - Hornady

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Hornady’s CriticalDefense is the firstand only handgunammunition linedesigned andengineered at alllevels specificallyfor the needsand situation ofthe modernarmed citizen.By Dick Metcalf, Executive Technical EditorThis 185-grain .45 ACP Critical Defense bullet from a 3-inchModel 1911 penetrated 11 inches of ballistic gelatin after passingthrough a heavy clothing barrier. Note fabric and downmaterial pasted to nose of polymer insert, which could haveplugged the nose cavity of a conventional hollowpoint bullet.For personal-defense or homedefensehandguns, particularlyfor the ever-growing numbersof compact and short-barreledpistols and revolvers on the market,proper ammunition choice can literallybe a life-or-death decision. Thischoice is neither simple nor easy,and there are many considerationsto be weighed. Hornady’s CriticalDefense ammunition line offers aremarkable new alternative for themillions of Americans who are takingadvantage of their legal rightto carry firearms concealed on theirpersons for protection.The fundamental purpose of apersonal-defense handgun cartridgeis to incapacitate a violent attackeras quickly as possible—to make himstop his assault before he can dealinjury or death to you or your lovedones. Put bluntly, the bullet from apersonal-defense handgun load mustbe able to penetrate deeply whileopening as large a wound channelas possible, disrupting critical organfunction and causing immediate,massive loss of blood pressure andattendant neural/motor function.Not “knock-down” power (there’s nosuch thing), but disruptive power.For this reason, expanding hollowpointbullet designs have alwaysbeen preferred for personal defenseas opposed to solid nonexpandingbullets, which can penetrate deeplybut do not typically cause immediatelydestructive organ damage evenwhen passing through vital areas.Unfortunately, there has been afundamental drawback to expandinghollowpoint bullet design ever sincethe very first popular high-performanceJHP handgun ammunitionline, SuperVel, appeared on the marketin the late 1960s. Hollowpointsare by definition more fragile thansolid-design bullets. They have to bein order to upset. But this verycharacteristic also makes themsubject to interference or damagefrom impact with external and internalmaterials such as clothing orbone, which can prevent them fromexpanding as designed (or causethem to expand prematurely andprevent sufficient penetration).All the many hollowpoint bulletdesigns currently on the market(and there are many good ones)operate by the same basic principle.When a hollowpoint strikes tissue,pressure-liquefied protoplasm(which is 90 percent water to beginwith) at the point of impact is forcedinto the hollow nose cavity, generatinghydraulic pressure that forcesthe cavity open, peeling back thejacket material and “mushrooming”the internal core material. That’sif everything goes right. But if thenose cavity is blocked, either bybeing plugged (the “cookie-cutter”effect) or collapsed by barrier52 SHOOTING TIMES/DECEMBER2010/JANUARY2011 shootingtimes.com

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