Redding Neck Sizing Bushings are engineered for precision and compatibility, available in two distinct styles that feature the same external dimensions 1/2 inches O.D. x 3/8 inches long. These bushings are designed to freely interchange in all Redding Bushing Style Sizing Dies, offering unparalleled versatility for reloaders. With size increments of .001 inches, they cover a comprehensive range from .185 inches to .368 inches, supporting calibers from .17 to .338. Each bushing is clearly marked with its size I.D., ensuring quick and accurate selection. By choosing the appropriate bushing, you can achieve the perfect neck tension, securely holding the bullet while avoiding unnecessary resizing, ultimately ensuring consistent and reliable ammunition performance.