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The Redding 06124 Pilot Stop is a small but important piece if you're measuring 6mm and .243 brass with any real precision. It's machined from stainless steel and sized to fit standard 3/16" mandrels, which makes it the go-to version for most reloaders working this caliber. There's also a smaller 9/64" mandrel version (the 06123) for folks with that setup, so this one is specifically the standard-size option.
What makes these stops worth having is the shape. Redding cuts a slight undercut into the profile so it seats against new or resized case necks without catching on the little imperfections that always seem to live at the case mouth or the neck and shoulder junction. The result is smooth, repeatable contact, which is exactly what you want when your readings come down to thousandths on a dial indicator.
This piece is designed to run with the Redding Case Neck Gauge and Flash Hole Deburring Tools. Drop it on the mandrel, index your case, and you get consistent neck wall and runout readings you can trust batch to batch. Because the undercut handles the brass cleanly, you're not fighting false readings or chasing numbers that don't repeat.
It's CNC machined stainless, so it holds its dimensions and shrugs off the kind of handling a reloading bench dishes out. While it's built for the Redding system, the standard 3/16" mandrel sizing means it plays nicely with similar tools from other makers too. Keep in mind pilot stops are caliber specific, so this one covers your 6mm and .243 work and you'd add other sizes as your caliber lineup grows. If you're serious about consistent brass prep in 6mm, having the correct stop on hand is one of those small details that quietly pays off at the target.
Both cover 6mm and .243 brass, but they fit different mandrel sizes. The 06124 is built for standard 3/16" mandrels, which is the common setup, while the 06123 is made for the smaller 9/64" mandrels. Match the stop to the mandrel you're running.
It's designed to run with the Redding Case Neck Gauge and Flash Hole Deburring Tools. Thanks to the standard 3/16" mandrel sizing, it also works with similar tools from other manufacturers.
The slight undercut keeps the stop from catching on imperfections at the case mouth or the neck and shoulder junction. That gives you smooth, consistent contact and more accurate, repeatable readings on your dial indicator.
Yes. Pilot stops are caliber specific, so this 06124 handles your 6mm and .243 brass. As you add calibers to your reloading bench, you'll want the matching stop for each one.
| UPC | 611760061240 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 06124 |
| Caliber/Gauge | .243/6 mm (.243) |
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