Redding Neck Sizing Bushings come in two styles, both with the same external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring they easily interchange with all Redding Bushing Style Sizing Dies. These bushings are available in precise .001 inches size increments, covering the range from .185 inches to .368 inches and supporting all 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 provide the ideal amount of neck tension to securely hold the bullet without excessive resizing, ensuring consistent and reliable ammunition performance.