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If you've ever tried to neck a case up to .30 caliber using a stack of mandrels, you know how slow and fiddly that gets. The Redding Tapered Sizing Button (part #16307) takes care of that in one pull of the handle. It's a long tapered expander built to open the necks of bottleneck cartridges, handling anything in the 6mm to .30 cal range and bringing them up to final diameter without a bunch of intermediate steps.
The gradual taper is the whole point here. Instead of forcing brass through a sharp step, the long cone eases the neck open so the walls stay concentric and the metal doesn't get worked any harder than it has to. Reloaders forming wildcats and custom cases lean on this piece because it opens a smaller parent case neck up to the larger caliber cleanly, which matters a lot if you're neck turning afterward and want a consistent wall to work against.
This button is made to run in Redding Standard and Type S sizing dies that have enough inside diameter to clear the case body without contact. It threads onto your decapping rod and replaces the standard size button already in the die. Keep in mind this is the size button only. The decap rod isn't part of the package, so you'll be using the one already set up in your die.
Lube is your friend with this tool. Run a little case lube on the button itself and inside the case necks before you expand, and the brass will glide up over the taper with far less effort and less chance of a stuck case. Expanding dry is where people run into trouble. Machined in the USA from steel, this expander holds its dimensions pass after pass, so once you've got your process dialed in you'll get repeatable necks every time. For anyone building 30 BR, 300 Blackout from 5.56 brass, or any other project that starts from a smaller caliber parent case, this is one of those small parts that quietly does a big job.
It expands the necks of bottleneck cartridge cases up to your desired diameter. This 30 cal version brings necks up to .30 caliber in a single pass, and the long gradual taper keeps the necks straight and concentric. Reloaders use it both for standard neck expanding and for forming custom or wildcat cases from a smaller parent case.
It's designed for Redding Standard and Type S sizing dies. The die just needs enough inside diameter to clear the case body without the brass touching the die walls. The button threads onto the decapping rod and takes the place of the standard size button that came in your die.
No, this is the size button only. The decap rod is not included, so you'll install this button on the rod already set up in your sizing die. That's normal for this part since it's meant as a replacement or upgrade for an existing die.
Yes, lube makes a real difference here. Put a little case lube on the button and inside the case necks before expanding so the brass glides over the taper smoothly. Expanding dry increases effort and the risk of a stuck case, so take the extra second to lube up.
| UPC | 611760163074 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 16307 |
| Caliber/Gauge | .30 Caliber |
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