Redding Neck Sizing Bushings are designed for precision and ease of use, available in two styles that share the same external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring full compatibility and interchangeability with all Redding Bushing Style Sizing Dies. These bushings come in .001 inches size increments, covering a range from .185 inches to .368 inches and are suitable for 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 achieve the optimal neck tension to securely hold the bullet without over-resizing, ensuring consistent performance and reliable ammunition.