Redding Instant Indicator/257 Roberts Imp 40

The Redding Instant Indicator for .257 Roberts Improved 40-degree shoulder is a precision reloading tool built for hand loaders who need consistent, repeatable ammunition. Unlike guesswork and measuring tape, this indicator gives you objective headspace and bullet seating depth comparisons accurate to .001 inch—critical precision for reliable rifle performance and consistent accuracy downrange.

Built around the reality that uniformity drives accuracy, the Instant Indicator lets you quickly sort and verify multiple dimensions of your ammo without disassembly or complex math. Whether you're setting up a new sizing die, checking how much shoulder bump you're applying, confirming trim lengths are consistent, or verifying seating depth across a batch of loaded rounds, this tool handles the work in seconds. It's especially valuable if you've fired cases in more than one rifle and need to sort them by headspace before resizing.

The .257 Roberts Improved 40 version comes with all the contactors and gauges needed for that cartridge—bore diameter bushing, surface contactor, shoulder contactor, and headspace gauge—plus instructions. The tool fits the .257 Roberts Imp 40 specifically, though it can work across similar cartridges sharing the same shoulder angle.

Key Features

• Headspace and seating depth comparisons to .001 inch tolerance
• Quickly sort bullets, cases, and loaded ammunition for uniformity
• Verify shoulder bump and trim length consistency
• Confirm sizing die setup before full production runs
• Includes bore diameter bushing, surface contactor, shoulder contactor, and headspace gauge
• Complete instructions provided

Specifications

Frequently Asked Questions

Can I use this Instant Indicator for other cartridges?

The .257 Roberts Imp 40 version is designed for that cartridge specifically. However, it can work for other cartridges with the same 40-degree shoulder angle. Check your cartridge specifications before attempting crossover use.

What's the measurement accuracy of this tool?

The Instant Indicator allows you to compare headspace and bullet seating depth within .001 inch, making it suitable for precision reloading work where consistency matters.

What does the Instant Indicator come with?

Your package includes one bore diameter bushing, a surface contactor, a shoulder contactor, a headspace gauge, and complete instructions for setup and use.

How do I use this if I've fired cases in multiple rifles?

The Instant Indicator lets you quickly sort fired cases by headspace, comparing them to determine which rifle fired which case. This is essential before resizing cases that have been cycled through different firearms.