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 in all Redding Bushing Style Sizing Dies. These bushings come in precise .001 inches size increments, covering a range from .185 inches to .368 inches and accommodating all calibers from .17 to .338. Each bushing is clearly marked with its size I.D., allowing for quick and accurate selection. By choosing the correct bushing, you can provide the ideal amount of neck tension to securely hold the bullet, minimizing excessive resizing and ensuring consistent, high-performance ammunition.