The Hornady Lock-N-Load O.A.L. Gauge (C1000) is a straight overall-length gauge designed to establish repeatable bullet seating depth and the resulting jump to the rifling for bolt-action and single-shot firearms. It provides a direct method to measure the relationship between bullet seating and the rifling, helping shooters achieve consistent seating depth. The gauge is intended to be used with a Lock-N-Load Modified Case that threads onto the gauge; the modified case is sold separately. Hornady specifies the gauge dimensions are accurate to within 0.001 inches.
Key Specifications
- This is an Overall Length Gauge intended for regulating seating depth and jump to the rifling.
- Compatible with All Bolt Action/Single Shot Rifles and any firearm with straight-line access to the chamber.
- Construction material is Steel for durable, repeatable measurements.
- Caliber compatibility is listed as Multi-Caliber.
- Model designation is C1000.
- Size/configuration is Straight, for straight-line chamber access.
- Accuracy is specified as accurate to 0.001 inches.
- Requires a Lock-N-Load Modified Case (sold separately) that threads onto the gauge to fit the specific chamber.
- Quantity included: 1.
- Overall dimensions are 1.60 x 4.15 x 16.10 inches.
The Lock-N-Load O.A.L. Gauge is a practical tool for reloaders seeking consistent seating depth and minimized variation in bullet jump to the rifling. Its straight configuration and steel construction make it suitable for bolt-action and single-shot platforms where direct chamber access is available. With the appropriate Lock-N-Load Modified Case installed, the gauge provides a precise reference point for setting seating dies and establishing repeatable overall cartridge length.
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.




