Redding 73 Style Steel Bushing .300 – Heat Treated Neck Sizer

Description

Neck tension is one of those little details that separates good handloads from great ones, and this is where the Redding 73 Style Steel Bushing in .300 earns its keep. It sizes your cartridge necks to exactly .300 inch, letting you hold the bullet with just the right amount of grip. No overworking the brass, no guessing. Redding built the whole interchangeable bushing system, and this is the precise little component that makes it work.

What the .300 Steel Bushing Does for Your Loads

The idea is simple but powerful. Instead of one fixed sizing diameter, you pick the bushing that matches your brass thickness and bullet fit. By selecting the correct bushing you set just enough neck tension to hold the bullet securely without excessive resizing, which means less brass stress, longer case life, and more consistent seating from round to round. For precision shooting and load development, that kind of control adds up fast.

How the 73 Style Bushing Is Built

This one is machined from heat-treated steel with the sizing diameter hand-polished to a surface hardness of Rc 60-62, which cuts down on sizing effort and keeps the bushing holding its size through a lot of reloading cycles. The 73-style profile shares the standard external dimensions, so it drops straight into any Redding bushing-style neck sizing die. Swap it in, swap it out, run a different tension setup, all without buying another die body.

Picking the Right Size

The easiest way to land on the correct bushing is to measure the outside neck diameter of several loaded or dummy rounds with a good micrometer, then subtract .001 inch from the smallest average measurement. That slight bit accounts for brass spring-back and gives you a proper press fit on the bullet. If you run moly-coated bullets, you may want to go a thousandth or two tighter.