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Powerful in which way? Artillery pieces are capable of firing flechette rounds, essentially making them oversized shotguns.
As for the shotgun as defined as an individual weapon, the largest bore I'm aware of was the six gauge shotgun. Not a very practical battlefield weapon, however. Militaries typically use a .12 gauge shotgun, chambered for either 2-3/4 or 3" shotshells. Western nations lean more towards low brass munitions, while former Bloc countries and their client states lean more towards high brass shotgun shells.
Military shotguns aren't the most powerful - .12 gauge is pretty run-of-the-mill. However, some models are capable of pushing out an impressive amount of firepower, to include fully automatic fire, such as the Atchisson AA-12 or Pancor Jackhammer.
What else can I help you with?
Is AA-12 shotgun the most powerful shotgun?
Yes it is the most powerful shotgun.
Who has the worlds most powerful warplane?
us
What is the most powerful car subwoofer?
Eminent Tech TRW 17 is the worlds most powerful subwoofer.
Can somebody get killed with a shotgun?
Of course they can. A shotgun is one of the most powerful firearms on the open market
What is the most powerful automatic gun?
10 gauge shotgun
What is the most powerful action shotgun in the World?
AA-12
What is the worlds most powerful military?
United States Military
Which is the worlds most powerful locomotive?
the most powerfull locomotive is soviet 2TE126
Worlds most powerful military?
The United States of America China
How much did the worlds most powerful microscope cost?
500,000 euros
What is the Auto Assault-12 shotgun?
The Auto Assault-12 shotgun is the AA-12 the most powerful action close combat shotgun in the World. The Auto Assault-12 is really the machine shotgun, not like a regular shotgun. The AA-12 is the only powerful shotgun that can pears through wall, body armor with the grenade and even vehicles.
What is more powerful a shot gun or a magnum 357 revolver?
In most cases, the shotgun.
