What happens to barrel accuracy when a steel barrel is subjected to uneven tension?

When a steel barrel is subjected to uneven tension, its accuracy typically decreases. This is due to the fact that uneven tension can lead to warping or misalignment of the barrel, which negatively affects the trajectory of the projectile as it moves through the bore. Proper tension ensures that the barrel remains straight and consistent under different conditions (such as heat from firing). If the tension is uneven, certain areas of the barrel may expand or contract irregularly, leading to variations in the barrel's diameter and shape. These changes can result in inconsistencies in bullet path accuracy, causing shots to deviate from their intended target. Maintaining uniform tension is crucial for optimizing barrel performance and sustaining accuracy over repeated firings.