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Neck tension is one of those small things that quietly makes or breaks a precision load. A standard sizing die squeezes the neck down and then drags an expander ball back through it, which works but tends to overwork the brass. A bushing die skips that step and sizes the neck straight to your chosen diameter. This 0.234" steel bushing is one piece of that system, letting you set the grip on your bullet right where you want it instead of settling for whatever a fixed expander hands you.
It's machined from bare steel and self-centers in the die so it stays aligned with the case neck through the stroke. Sizing the neck down less than a conventional die means the brass works harder to stretch past its elastic limit, so your cases last longer and your neck tension stays more consistent from load to load. That consistency is exactly what benchrest and long-range precision folks have chased out of these dies for years. One thing worth knowing up front: because the bushing is in-the-white bare steel, you'll want to keep using normal case lube when sizing.
This bushing is built for RCBS Gold Medal Match sizing dies and also runs in the newer MatchMaster bushing dies. It plays nice with bushings from Redding, Wilson, and Hornady too, so if you've already got a mixed drawer of them, this one slots right in alongside. The die isn't included here, just the single 0.234" bushing itself.
Sizing matters more than brand when it comes to these. The quick method is to measure the outside neck diameter of a loaded round and subtract .002" to .003", which leaves about .001" of spring-back for proper tension. You can also measure your neck wall thickness, double it, add your bullet diameter, then subtract .001". Because brass varies, it's smart to keep a bushing or two above and below your target on hand so you can fine-tune without a reorder. The real payoff shows up when you pair these with quality brass that has consistent neck wall thickness.
It's designed for RCBS Gold Medal Match sizing dies and also works in the RCBS MatchMaster bushing dies. On top of that, it's compatible with bushing dies from Redding, Wilson, and Hornady. The die itself is sold separately, so this is just the bushing.
Measure the outside neck diameter of a loaded cartridge and subtract .002" to .003", which leaves roughly .001" of brass spring-back for correct neck tension. You can also measure your neck wall thickness, multiply by two, add your bullet diameter, then subtract .001". Since brass varies lot to lot, keeping a bushing a size above and below your target helps you fine-tune.
Yes. These bushings come in-the-white as bare steel, so you'll want to keep using your normal case lubrication when sizing. Skipping lube on bare steel is a quick way to stick a case.
A standard die sizes the neck down and drags an expander ball back through to set tension, which works the brass harder. A bushing sizes the neck straight to your chosen diameter in one pass, so there's less working of the brass. That means longer case life and more consistent neck tension, which is why precision and benchrest loaders favor them.
| UPC | 076683815491 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 81549 |
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