Conventional rifling uses either 6 or 4 symmetrical lands and grooves to stabilize the bullet. Each of the lands (the raised portion of the rifling) are directly opposite one another. The grooves are opposite of one another. The majority of barrels are conventionally rifled. The military and most machine guns also use conventional rifling.
5R is an improvement over conventional rifling by changing the shape and configuration of the lands and grooves. As effective as conventional rifling is, 5 R is an improvement in a couple different ways:
1.Conventional rifling has sharp 90-degree corners from the top of the land to the bottom of the groove.
2.Conventional rifling has lands and grooves opposing one another.
5R rifling improves this by using 5 lands and grooves over the even numbers which puts lands opposite of grooves. The transition from the top of the land to the groove is sloped.
5R reduces projectile deformation as it passes through the bore during the firing. By placing the lands opposite of the grooves, the bullets are no longer squeezed on opposite sides so that the projectile stays uniform instead of squeezing material into the grooves. More uniform projectile means better accuracy.
By sloping the transition to the groove, the barrel becomes much easier to clean. In a conventional rifled platform, these corners have a lead buildup and other superheated materials left after shooting. Cleaning brushes and patches have a tough time reaching these corners as they are very small. By sloping it, cleaning brushes and patches are more effective to get to the deposits for a better cleaning. A cleaner barrel means more accurate.
Conventional rifling has been used for many years and will continue to be a mainstay of most firearms. Though conventional rifling has proven to be very accurate for many years, 5R is considered an upgrade for those looking for additional performance. These improvements make it a great option for competitive shooting.
5R is an improvement over conventional rifling by changing the shape and configuration of the lands and grooves. As effective as conventional rifling is, 5 R is an improvement in a couple different ways:
1.Conventional rifling has sharp 90-degree corners from the top of the land to the bottom of the groove.
2.Conventional rifling has lands and grooves opposing one another.
5R rifling improves this by using 5 lands and grooves over the even numbers which puts lands opposite of grooves. The transition from the top of the land to the groove is sloped.
5R reduces projectile deformation as it passes through the bore during the firing. By placing the lands opposite of the grooves, the bullets are no longer squeezed on opposite sides so that the projectile stays uniform instead of squeezing material into the grooves. More uniform projectile means better accuracy.
By sloping the transition to the groove, the barrel becomes much easier to clean. In a conventional rifled platform, these corners have a lead buildup and other superheated materials left after shooting. Cleaning brushes and patches have a tough time reaching these corners as they are very small. By sloping it, cleaning brushes and patches are more effective to get to the deposits for a better cleaning. A cleaner barrel means more accurate.
Conventional rifling has been used for many years and will continue to be a mainstay of most firearms. Though conventional rifling has proven to be very accurate for many years, 5R is considered an upgrade for those looking for additional performance. These improvements make it a great option for competitive shooting.
