THE PROBLEM: Concentricity and Eccentricity

Even carefully reloaded bullets may easily contain errors of several 1/1,000“, often caused by minor mistakes in the reloading process, such as a slight misalignment of the projectile during its insertion in the case mouth or the use of uneven brass. The BERSIN device generally allows the detection and even reduction of these errors to under 1/1,000” (0.025 mm). In reloaded high precision ammunition produced with the most recent highly sophisticated reloading equipment, the targeted 0.001” accuracy can be controlled and will be improved to within a few 1/10,000 “.

The result of measuring and adjustment of the rifle cartridge is a much closer target diameter.

By means of a simple process of manual measuring and adjustment of industrially manufactured or reloaded ammunition, the eccentricity flaws can be corrected dramatically increasing the accuracy of your shot by up to 50%.

By aligning the projectile’s axis with the axis of the cartridge case, the projectile is pressed more accurately into the barrel throat. This avoids rotational imbalances in the projectile before and after the bullet leaves the barrel. A misaligned projectile in the cartridge case enters the barrel of the rifle on angle and slightly deformed. The lands and grooves of the barrel will further deform the projectile as it enters the barrel causing it to rotate nonuniformly down the barrel. This creates what is generally called a flyer or erratic shot.