The Hornady Lock-N-Load Modified Case C Series for .338 Lapua Magnum is a chamber-specific modified case intended for use with Hornady’s Lock-N-Load O.A.L. Gauge. It threads at the case head and features an oversized neck to accept the same bullets you plan to load, enabling highly repeatable overall-length measurements. Proper use of the modified case helps establish consistent seating depth relationships between bullet and rifling.
Key Specifications
- The cartridge is .338 Lapua Magnum.
- The series is C.
- Designed for the Lock-N-Load O.A.L. Gauge to obtain overall length measurements.
- The neck is oversized by .002″ to accept the intended bullets for loading.
- Gauge-derived dimensions are accurate to .001″ when used as directed.
- The case is threaded at the case head for installation on the gauge.
- Intended to replicate the firearm’s chamber for O.A.L. and seating depth checks.
This modified case is a practical tool for reloaders using the Lock-N-Load system who require consistent, repeatable O.A.L. and seating depth data. It provides a straightforward way to verify the relationship between bullet and rifling and supports careful, dimension-driven reloading workflows for precision shooting applications.
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.




