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General Julian Hatcher, a noted forensic pathologist, in the early 1900’s developed a good formula to determine the theoretical stopping power of a firearm cartridge. His formula has withstood the test of time and validation from other studies and data related to stopping power. You want a handgun cartridge that has a Hatcher value of over 50 for the most effective stopping power. Values over 55 have diminishing returns in that you don’t gain any significant increase in stopping power for the extra recoil and control you must cope with. Handgun cartridges that don’t make a value of at least...

Why do American troops prefer the century old .45 caliber pistol to lighter 9mm models. It’s all about “stopping power.” As far back as 1900, during the fighting against Moslem rebels in the Philippines, there had been complaints of enemy fighters getting shot and continuing to attack. From this experience, the then standard army pistol, a .38 caliber (9.65mm) weapon, was replaced by a .45 caliber (11.4mm) one. In the 1980s, the .45 was in turn replaced by a 9mm pistol. There were a lot of complaints about that, but 90 years of experience demonstrated that you should not depend...

April 23, 2004: The U.S. Marine Corps is looking for a new .45 caliber (11.4mm) pistol. While the American military retired the M1911 .45 caliber in 1985, some commando units still prefer it. This is because the 11.4mm (.45 caliber) bullet weighs twice as much as the 9mm one that replaced it and still has an edge in "stopping" someone hit with it. But the 9mm M9 pistol magazine carries 15 rounds, versus seven in the M1911. The commandos (Special Forces, SEALs, Marine Force Recon) counter that their operations are the type where every round counts, and the fewer you...

<p>BRISBANE, Australia (CNN) -- Imagine a gun that fires a million rounds a minute -- enough to shred a target in a blink of an eye, or throw up a defensive wall against an incoming missile.</p> <p>This is Metal Storm, a weapons system that forsakes old-style mechanics for the speed of electronics.</p>

Soldiers who fought in Afghanistan have some hard-earned opinions about the rifles on which they relied to stay alive. Mostly, they want more firepower. The standard-issue ammunition compounded the problem, they said: The 5.56 mm round shot — a bullet equivalent to that marketed in the States to shoot small vermin — wasn’t effective in stopping al-Qaida and Taliban fighters. “Should be a 7.62 mm, so it will drop a man with one shot,” wrote one soldier. Not all soldiers’ reviews were negative. Pat, a Special Forces soldier who is serving in Afghanistan, wrote the military watchdog group Soldiers for...