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 in all Redding Bushing Style Sizing Dies. These bushings come in .001 inches size increments, covering the range from .185 inches to .368 inches and accommodating calibers from .17 to .338. Each bushing is clearly marked with its size I.D. for easy identification. By selecting the correct bushing, you can apply the ideal amount of neck tension, ensuring a secure bullet hold without excessive resizing, which results in consistent, high-performance ammunition.