Up until the end of the Vietnam War they were. The 21st century technology might be different.
Earlier rifle designs did not have adequate strength for high powered cartridges. The bolt action is a very strong action, and is also a very accurate rifle. Bolt action rifles are used for hunting, target shooting, and for military sniper rifles.
ALL OTHER THINGS BEING EQUAL- yes, the bolt action is typically a more accurate rifle. However, there will be exceptions.
Single shot, bolt action, pump, semi-auto,
There were multiple bolt action rifles used in World War 2 on all sides. There were also semi and full-auto rifles used on all sides.
Typically, the bolt action rifle is capable of the greatest accuracy, although there are single shot rifles capable of exceptional accuracy, as well as some very good auto loading rifles. The most accurate rifle will probably have a heavy free floated barrel with a special muzzle crown, a special chamber, and a VERY precise trigger.
There are many different types. There are pistols, rifles and shot guns. Pistols can be semi auto or single shot or a revolver. Rifles can be semi auto or full auto or bolt action or single shot or lever action. Shotguns can be semi auto or pump or single or double shot.
Mossberg, Savage, Remington, Winchester, Marlin, .22 caliber rifles. They could be lever action, bolt action, pump, or semi auto.
Book of Bolt Action Rifles should help
It is possible, yes.
No.
Bolt and semi-auto
Are you asking about double rifles,rook rifles or bolt action.