Description
If you run a RCBS Hand Case Neck Turner and work with big-bore 500 brass, this is the pilot that makes it happen. The 90427 is the caliber-specific .500 pilot that slides inside the case mouth and rides against the inside of the neck, giving the cutter a true reference point so you shave an even layer of brass every time. Without the right pilot in place, the turner has nothing to guide it, and that even thickness is the whole reason you're turning necks in the first place.
How the 90427 .500 Pilot Works With Your Turner
Neck turning peels a thin, consistent layer of brass off the outside of the case neck, and most factory brass has enough thickness variation to cause concentricity and bullet runout headaches. This stainless pilot centers the case on the cutter and doubles as a case-mouth stop so the cut stays uniform down the full length of the neck. On the RCBS Hand Case Neck Turner, you zero the cutter to the pilot and then dial your depth in half-thousandth increments, which is why having the correct caliber pilot matters so much to the final result.
Why Stainless Steel Earns Its Keep
The pilot is machined from stainless steel, so it holds its dimension and shrugs off the wear and brass buildup that comes with repeated passes. That durability keeps your reference surface true session after session, and a true reference is what delivers repeatable neck thickness. A quick tip from the bench: measuring your expander ball against the pilot, with the ball about a thousandth larger, goes a long way toward a clean fit and trouble-free turning.
This is a single caliber-specific pilot sized for 500-class cases. It's the right call for handloaders chasing tighter neck tension and better accuracy out of their big-bore rifles, and it pairs directly with the RCBS Hand Case Neck Turner tool.
Key Specifications
- Manufacturer: RCBS
- Manufacturer Part Number: 90427
- UPC: 766839904277
- Product Type: Hand Case Neck Turner Pilot
- Caliber: 500 Cal
- Material: Stainless Steel
- Finish: Silver
- Compatible With: RCBS Hand Case Neck Turner
- Quantity: 1 Pilot
What’s Included
- One RCBS 90427 Hand Case Neck Turner Pilot, .500 Cal
Frequently Asked Questions
What does the RCBS 90427 pilot do during neck turning?
The pilot slides inside the case mouth and references the inside of the neck, giving the cutter a true center to ride against. This is what lets the turner shave an even layer of brass all the way around the neck. It also acts as a case-mouth stop so the cut stays uniform over the full length of the neck.
Do I need the RCBS Hand Case Neck Turner to use this pilot?
Yes. This is a caliber-specific pilot designed to work with the RCBS Hand Case Neck Turner tool, which is sold separately. The turner's cutter is zeroed to the pilot and then adjusted in half-thousandth increments to dial in your desired neck thickness.
Is the 90427 pilot caliber specific?
It is. This particular pilot is sized for 500-class brass, so it fits the .500 case necks you're turning. RCBS makes these pilots in a range of calibers, so you'll want the one that matches the cartridge you're working with.
What's a good check if the pilot won't seat right in the case mouth?
Most fit problems trace back to the relationship between your expander ball and the pilot. Measure both and confirm the expander ball is about a thousandth larger than the pilot. Getting that dimension right usually clears up a pilot that won't slide into the neck cleanly.





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