Redding Neck Sizing Bushings are available in two styles, both with identical external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring seamless interchangeability across all Redding Bushing Style Sizing Dies. These bushings are offered in .001 inches size increments, ranging from .185 inches to .368 inches, covering all calibers from .17 to .338. Each bushing is clearly marked with its size I.D., allowing for easy identification and selection. By choosing the appropriate bushing, you can achieve the precise amount of neck tension needed to securely hold the bullet, ensuring consistent performance without excessive resizing.