Wiki User
∙ 2007-12-28 13:37:37the micro groove is button cut and ballard is the lands and grooves are not equally spaced
Wiki User
∙ 2007-12-28 13:37:37Marlin switched from Ballard rifling to the newer micro-groove on their 81 DL model in 1954.
It is Ballard style rifling, and should date to 1999. The year of manufacture is 2001. 1st 2 digits of serial # correspond to the year it was made. Ballard rifling is correct.
Can be hammer forged, cut or drawn.
Smoothbore: muskets, musketoon, carbine, blundebuss, howitzer. Rifling made a great difference to accuracy of firearms. I would add to that Mortars.
A musket is smooth bored, like a shotgun's bore. A rifle has rifling inside the bore (grooves).
Rifles have spiral grooves cut into the inside of the barrel, known as rifling. Muskets are smoothbore. Rifling causes the bullet to spin in flight, permitting accuracy at long ranges. Also slower to load.
When rifled, the rifling tool cuts the GROOVES. Material left between the grooves is the LANDS.
Length, rifling (sometimes)
In relation to firearms, it has to do with the rate of rifling in the barrel. Rifling is the spiral grooves that puts a spin on a bullet to increase it's accuracy. "Barrel twist" is the rate of spiraling or inches per turn. That is the length of barrel it takes to spin the bullet a full 360 degrees.
A rifle is a firearm with a shoulder-stock which is used to propel a bullet to strike a distant target. The Rifle is distinguished from the muskets of eras past, by the presence of 'rifling'. Rifling is the presence of spiral grooves cut into the interior of the barrel. Rifling induces a spin on the bullet resulting in more stable flight through the air. This spin has the effect of making the firearm more accurate by not only giving the bullet a straighter flight-path, but making the rifle's point of impact more consistent. (Consistency allows the user to properly adjust his sights to ensure his bullets hit where he or she aims.) Previous firearms such as muskets had no rifling. Today shotguns have shoulder stocks, but are typically smooth on the interior and have no rifling. (Some shotguns with rifled barrels exist to shoot specialty 'sabot' ammunition. While still called shotguns by the shooting community at large, the correct term for these firearms is Bore Rifle.) Modern handguns also incorporate rifling, but lack shoulder-stocks and are referred to as pistols.
The rifling is there to spin the bullet, which gives greater accuracy.
RIFLED firearms are those that have a method of making the bullet spin when fired. This makes for a much more accurate projectile. The oldest and most common means of doing this is buty cutting spiral grooves on the inside of the barrel. These grooves grip the bullet, causing it to spin as it passes up the barrel. The grooves are known as rifling.