Redding Instant Indicator Headspace and Bullet Comparator Without Dial Indicator 300 PRC

The Redding Instant Indicator Headspace and Bullet Comparator for 300 PRC gives you precision measurement where it matters most in reloading: headspace and bullet seating depth to the lands. This version comes without a dial indicator, making it the smart choice if you already have a compatible indicator in your reloading bench setup. You get the base tool and stem(s) calibrated specifically for 300 PRC—just pair it with your own dial indicator (0.375" stem diameter) to start taking repeatable, accurate measurements that keep your loads safe and consistent.

Reloaders who chase precision know that seating depth to the lands can be the difference between a load that barely functions and one that groups tight. The Instant Indicator takes the guesswork out of that process. Instead of fumbling with comparator buttons or trying to feel your way to the lands, you lock in your cartridge, read your dial, and know exactly where you stand. For 300 PRC shooters working up loads or validating ammunition, that kind of confidence is worth its weight.

If you're already invested in quality dial indicators, this tool-only configuration keeps your cost down while delivering the same Redding engineering and 300 PRC-specific fitment. It's a straightforward addition to a reloader's toolkit—no bloat, no redundant gauges, just the precision you need to dial in your handloads.

Key Features

• Calibrated specifically for 300 PRC cartridges
• Measures headspace and bullet seating depth to the lands with precision
• Base tool and stem(s) only—dial indicator not included
• Compatible with 0.375" stem diameter dial indicators
• Redding-grade engineering and accuracy

Frequently Asked Questions

What dial indicator do I need to use this 300 PRC comparator?

You'll need a dial indicator with a 0.375" stem diameter. This is the standard size for most quality reloading dial indicators. If you're unsure about your current indicator, measure the stem diameter before ordering.

Can I use this Instant Indicator to measure other cartridges besides 300 PRC?

This tool is calibrated and configured specifically for 300 PRC. For other cartridges, you'd need the appropriate version for that caliber.

What's included in the box?

You receive the base tool and stem(s) configured for 300 PRC. The dial indicator is not included—you must supply your own compatible 0.375" stem dial indicator.

How do I use this to measure bullet seating depth to the lands?

Insert your loaded round into the comparator, lower the indicator stem onto the bullet tip, and read the measurement on your dial indicator. Compare it to your target seating depth to dial in consistency across your ammunition.