The 7.62x54mm rifle cartridge has a shell casing that measures 54mm in length and 7.62mm in diameter. It is a rimmed cartridge, commonly used in military rifles and machine guns, such as the Mosin-Nagant and the PK machine gun. This cartridge is known for its effectiveness and range, making it a popular choice in various conflicts since its introduction in the late 19th century.
it is shotgun because the size of rifle is different than shotgun.
Not familiar with an atomic rifle. There have been artillery pieces that can fire an atomic shell, but not a rifle.
no
The correct size of the bullet that fits the rifle.
The Riflemans gun held 12
By pulling the trigger, by dropping it with a shell in the chamber and by a slamfire.
22 bullets come in short, standard and long. Your rifle is telling you that you have to purchase .22 long shell bullets.
The correct term is cartridge- which is the cartridge case, primer, powder, and bullet. A sniper rifle is simply an accurate, long range rifle that is used by a sniper. It may look exactly like my long range hunting rifle- since most military sniper rifles BEGAN as a civilian hunting weapon.
By handling it
2-4 decades if stored cool and dry
The 7mm designation is a reference to the bore size, or diameter. In decimal size it means this rifle has a barrel groove diameter of .284 inch.
There is no one answer- it depends on the rifle. They are generally less powerful than a full size battle rifle cartridge. The M16 rifle uses a 5.56mm bullet, the AK47 a 7.62mm bullet, etc.