Designed for use with the Hornady Lock-N-Load Headspace Gauge, this .420″ headspace bushing provides a precise reference for measuring cartridge headspace during reloading. Machined to exacting tolerances, it is intended for use with the Hornady Headspace Comparator to help ensure consistent case sizing and fit. The bushing supports measurement of a range of bottleneck rifle cartridges as listed by Hornady.
Key Specifications
- Size is .420 inches for headspace reference during case measurement.
- Designed for use with the Lock-N-Load Headspace Gauge to provide a consistent datum.
- Intended for use with the Hornady Headspace Comparator to measure case shoulder and overall fit.
- Compatibility includes 284 WIN, 7mm Rem Mag, 300 Win Mag, 8mm Rem Mag, 338 Win Mag, 375 H&H, 7mm STW, 7mm Ultra Mag, 300 Ultra Mag, 300 WSM, and 338 Ultra as listed by the manufacturer.
- All bushings are interchangeable with the Comparator for repeatable measurement procedures.
- Bullet comparator and calipers are sold separately and are not included with this bushing.
- Machined to exacting tolerances to provide reliable results during reloading operations.
- Helps extend brass life and improve consistency when used as part of a proper reloading workflow.
For reloaders who require repeatable headspace verification as part of their loading routine, the Hornady .420″ Lock-N-Load headspace bushing is a focused tool that integrates with Hornady’s Comparator and Lock-N-Load systems. It provides a simple, durable reference for measuring case fit and can be a useful component in a precision-focused reloading bench.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.




