Redding Neck Sizing Bushings are designed for precision and versatility, available in two styles with identical external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring full compatibility and easy interchangeability across all Redding Bushing Style Sizing Dies. These bushings are offered in .001 inches size increments, covering a range from .185 inches to .368 inches and support calibers from .17 to .338. Each bushing is clearly marked with its size I.D. for straightforward selection. By choosing the right bushing, you can achieve the perfect amount of neck tension to securely hold the bullet, minimizing excessive resizing and ensuring consistent and reliable reloading results.