The Hornady Lock-N-Load Modified Case in .358 Winchester (B Series, part no. B358) is specially machined to work with Hornady’s Lock-N-Load Precision gauges, not to be loaded and fired. A fine thread at the case head attaches it squarely to the gauge, and the neck is machined perfectly round and opened just enough to slip a standard bullet in without binding, so your readings stay consistent from one measurement to the next. Reloaders who track headspace and cartridge overall length on .358 Winchester brass rely on a caliber-correct modified case exactly like this to keep those numbers trustworthy at the bench.

Key Specifications

• .358 Winchester chambering, B Series, threaded to fit Hornady Lock-N-Load Precision gauges.
• Case neck machined perfectly round and slightly opened to accept a standard bullet without binding.
• Threaded at the case head for a secure, repeatable mount on the gauge.
• Comes ready to thread directly onto your LNL gauge — no fitting or modification needed.
• Gives a fixed, caliber-correct reference so readings stay comparable across sessions.

Frequently Asked Questions

What is this used for? It threads onto a Hornady Lock-N-Load Precision gauge to give you a repeatable, caliber-specific reference for headspace and cartridge overall length measurements.

Can I load and fire this case? No — it’s a modified gauge accessory machined to mate with Hornady’s LNL measuring tools, not a case meant for loaded ammunition.

Buy the Hornady Lock-N-Load Modified Case, B Series, .358 Winchester

Keep your measurements accurate and repeatable with the correct caliber-matched accessory. Order from our Lubbock, Texas gun shop for fast, insured shipping, and browse the rest of our reloading equipment selection.