Redding Neck Sizing Bushings are available in two styles, both with the same external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring seamless interchangeability with all Redding Bushing Style Sizing Dies. Offered in .001 inches size increments, these bushings cover the range from .185 inches to .368 inches, accommodating calibers from .17 to .338. Each bushing is clearly marked with its size I.D. for easy identification. By selecting the appropriate bushing, you can achieve the ideal amount of neck tension, ensuring the bullet is securely held without excessive resizing, leading to consistent and precise ammunition performance.