Redding Neck Sizing Bushings come in two styles, both featuring the same external dimensions of 1/2 inches O.D. x 3/8 inches long, allowing for easy interchangeability in all Redding Bushing Style Sizing Dies. These bushings are available in .001 inches size increments, spanning the range from .185 inches to .368 inches and covering calibers from .17 to .338. Each bushing is clearly marked with its size I.D. to ensure quick and accurate selection. By choosing the appropriate bushing, you can achieve the ideal neck tension, ensuring that the bullet is securely held without unnecessary resizing, promoting consistent and reliable performance.