For extreme accuracy, the recommended cartridge run out should be kept to what measurement?

For extreme accuracy in ammunition, the recommended cartridge run out should be maintained at .001 inch. This tight tolerance is important because any variability in the alignment of the bullet within the cartridge can impact the consistency and precision of each shot.

When the run out is minimal, it ensures that the bullet exits the barrel in a straight line, leading to improved accuracy. A run out measurement of .001 inch strikes a balance between being achievable in practical terms while still being precise enough to contribute significantly to the overall accuracy of the shooting experience. Maintaining this level of consistency allows for greater predictability in the ballistic performance of the ammunition, which is critical for precision shooting.

Higher precision measurements, such as .0001 inch, may not be necessary for most applications and could be challenging to achieve during typical loading processes. Conversely, looser tolerances like .01 inch or .005 inch do not provide sufficient alignment for the rigorous demands of extreme accuracy, likely resulting in decreased performance and increased variability in shot placement.