Redding Neck Sizing Bushings are available in two styles, both featuring identical 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 span the range from .185 inches to .368 inches and cover 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 achieve the ideal neck tension to securely hold the bullet without over-resizing, ensuring consistent, high-quality ammunition performance.