Rifles are a firearm with rifling applied to the bore. With the advent of rifling came a new era of firearm accuracy. Before rifling firearms had a smooth bore like a shotgun.
Table of Contents
A rifle, is a firearm with rifling applied to the bore. Firearms began with a smooth bore like a shotgun. With the advent of rifling came a new era of firearm accuracy.
History of the rifle
The smooth bore predecessor of the rifle.
German gunsmiths discover rifling
German gunsmiths cut spiral grooves ‘rifling’ to a muskets bore, significantly improving the accuracy of the firearm. The rifle was born.
Rifling appears in firearms
Rifling begins to appear commonplace spreading throughout Europe.
German Hunting Rifles come to America
German gunsmiths immigrate to the settlements of southeastern Pennsylvania.
Kentucky Long Rifle
Created in the 1730s in Lancaster, Pennsylvania. No rifle history would be complete without a mention of this firearm. Developed by the same immigrant tradesmen to be the marksman’s weapon of choice for a over a century. The barrel, made longer than their European counterparts, gave the black powder a longer time to burn thereby increasing muzzle velocity and accuracy.
It is believed that Hessian mercenaries from Germany brought Jäger rifles with rifled bores to use fighting for the British during the American Revolution. American colonists armed with Kentucky Long Rifles played an important part in many battles. Where the standard firearm in use was a smooth bore “Brown Bess” with an accurate range of 60 yards. The Long Rifle was accurate to 200 paces or yards.
Napoleonic wars and the War of 1812
During these conflicts the Long Rifle continued to be used to great effect by sharpshooters. Wider adoption however was hindered by the fact that these rifles were slower to load than their smooth bore counterparts.
With the German Dreyse Needle gun, breech loading entered the rifles history. Far faster to load than muzzle loaders and the ability reload from the prone position. These rifles completely changed the way the firearm was used in conflicts.
Developed by Claude-Etienne Minié, the projectile that bore his name solved the problem of slow loading times whilst simultaneously further increasing the rifles accuracy. Improving on the original design work done by Henri-Gustave Delvigne.
A straight piece of metal that houses the bore. A rifle has a long barrel with rifling. The walls of the barrel are typically thick, this is to handle some high pressures generated when a bullet is fired from the chamber. Usually used to fire at stationary targets and at a variety of ranges. The rifle barrel is designed for one specific caliber.
A hole was drilled longitudinally through the barrel. The interior space cut down the centre of a rifle barrel. It is through this space that a bullet or projectile is propelled when a rifle is fired.
A projectile propelled down the bore by expanding gases, which are typically caused by the rapid combustion of the powder contained in the bullet’s cartridge.
The diameter of the interior of the rifle barrel, known as the bore. Typically measured between the faces of opposing lands, the ridges between the grooves cut in the bore by rifling.
The long cuts that are carved in a twist down inside of the rifle bore.
The raised ridges left in the bore after the grooves have been cut.
Spiral grooves cut into the bore. In an attempt to stop the bore from getting clogged with lead and black powder. German gunsmiths cut grooves in the bore of a musket. Initially, longitudinal grooves run straight down the barrel. It was not until the grooves were cut in a spiral that the “rifling” effect became apparent. The spiral grooves imparted a spin on the bullet, significantly improving the accuracy of the firearm.
Rifling Pitch (Twist Rate)
The rotational speed imparted to the projectile can be crucial. The spin speed is too slow and the projectile may just tumble as it came out of a smooth bore. Too high a spin speed and the projectile may break apart with equally undesirable results.
The speed at which the bullet spins depends on the number of twists per length of the barrel. This twist or pitch is usually described as one turn per “x” distance. The distance is measured in mm in Australia and inches in the USA. Typically you will see the barrel described as 1: 381 mm or 1: 15″. This can also be shown as 1/381 mm or 1/15″.
Rifling Twist Direction - Left Hand or Right Hand
You will see grooves cut in both left-hand and right-hand patterns. British rifles, the Lee Enfield .303 for example are traditionally made with a left-hand twist. The reason for this is that the twist, left or right, tends to make the bullet drift very, very slightly in the same direction as the twist.
The British surmised at the time, that as most of their shooters were right-handed, they would tend to pull the trigger to the right. The theory was that the left-hand drift and right-handed trigger pull might cancel each other out to some degree. This thinking was discarded later as insignificant but the manufacturing tradition continued.