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That depends. Rifle, shotgun, pistol, cannon, pellet gun, or airsoft? The 16" guns on a battleship can fire a one ton shell about 26 miles, but they are not "on the market". For rifles, the .50 BMG is close to the upper limit. Shotguns- the 10 g 3.5" magnum, and handgun is a tossup- .500 S&W being in the upper ranks, although there are many handguns in rifle calibers (even one in .600 Nitro Express, and one in .50 BMG)

For rifles, it's probablly the Russian PTRS anti-tank rifle. The 14.5 x 114mm cartridge fires a 65.5 gram bullet at 3200 feet per second- far more energcy than the .50 Barrett, or elephant guns such as the .600 Nitro Express or .460 Weatherby magnum.

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13y ago
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14y ago

"Gun" has various meanings. Artillery pieces are referred to as "guns", as are battleship deck guns.

As far as individual, man portable weapons go, which are intended to be operated by one person, the Croatian RT-20 and South African Denel NTW-20x110 would be your likely answers. Both are anti-materiel sniping weapons designed to fire a 20x110mm cartridge developed for the Hispano-Suiza antiaircraft cannons.

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Q: Whats the most powerful gun the the world?
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