Redding 73 Style Steel Neck Sizing Bushing .313 – 73313

Description

This is the Redding .313 steel neck sizing bushing, part number 73313, one piece in Redding's huge range of interchangeable neck bushings. If you run a bushing style die, this little steel ring is what sets your sizing diameter, which means you control exactly how much your case neck gets squeezed down and how tightly it grips the bullet. Machined from heat treated steel with hand polished sizing surfaces at Rc 60-62 hardness, it keeps sizing effort low and holds its dimension through a lot of use.

Where the Redding .313 Steel Bushing Fits

These bushings share a common 1/2 inch outside diameter by 3/8 inch long body, so they freely interchange across all of Redding's bushing style neck sizing dies and the Type S sizing dies. One nice thing about the design is that the bushing floats and self centers on the case neck as it enters, which helps keep everything concentric. That interchangeability is the whole point. You can own one die body and keep a handful of bushings on hand to tune neck tension for different brass or bullet combinations without buying a new die every time.

Picking the Right Neck Bushing Size

Getting your bushing size right matters more than the bushing itself. The reliable way is to measure the outside neck diameter of a loaded round, with a bullet seated, using a good micrometer. From there, subtract .001 to .002 inch to account for brass spring back and to set your neck tension. The .313 size slots in for loaders working in that neck diameter range, and every bushing is clearly marked with its size so you always know what's in the die.

Bench rest and precision rifle handloaders lean on this system because tuning neck tension is one of the easiest ways to tighten up groups. If you're already running a Redding bushing die, having the correct size on the bench keeps your loads consistent round after round.