Hornady Lock-N-Load Modified Case (B7MM) is a precision brass case made specifically for 7mm Remington Ultra Magnum reloaders who use the Hornady Lock-N-Load Overall Length Gauge to set accurate bullet seating depth. This 7mm Remington Ultra Mag modified case works well for buyers searching for a Hornady Lock-N-Load modified case that fits 7mm RUM chambers and supports consistent long range hunting and target loads.
Key Features
- Manufacturer part number: B7MM.
- Caliber: 7mm Remington Ultra Magnum.
- Case material: high quality brass construction.
- Neck: approximately 0.002 inch oversized neck to accept standard 7mm bullets you intend to load.
- Head: threaded case head to attach directly to Hornady Lock-N-Load OAL Gauges.
- Chamber fit: manufactured to SAAMI specifications for 7mm Remington Ultra Magnum chambers.
- Compatibility: works with Hornady Lock-N-Load Overall Length Gauges designed for modified cases.
Special Features
- Threaded case head design allows fast, repeatable attachment to the Lock-N-Load Overall Length Gauge without tools.
- Oversized case neck holds bullets with a light slip fit so they move smoothly as you push them into the rifling for precise measurements.
- SAAMI spec chamber dimensions help you duplicate real chamber conditions when checking bullet seating depth and jump.
- One piece brass construction provides a rigid, repeatable reference that does not flex under gauge pressure.
- Factory prepared modified case saves time compared to drilling and tapping your own brass, and helps prevent alignment errors in homemade tools.
- Marked as a dedicated 7mm Remington Ultra Mag modified case so it stays organized with other Lock-N-Load modified cases on your bench.
Practical Benefits
- Hornady B7MM 7mm Remington Ultra Mag Lock-N-Load Modified Case lets you determine the exact distance from your chamber throat to your bullet ogive so you can tune seating depth for accuracy.
- The slip fit neck and threaded head simplify your workflow when you test different bullets and profiles in the same 7mm Remington Ultra Mag rifle.
- Consistent overall length data from this modified case supports more uniform velocities and tighter groups in hunting, tactical, and long range target ammunition built for 7mm RUM platforms.
- Using a dedicated Hornady Lock-N-Load modified case for 7mm Remington Ultra Mag keeps your measurements compatible with popular bullet comparators and standard reloading records.
- You can quickly confirm what overall length works with different bullet weights, so your 7mm Remington Ultra Mag loads feed reliably from magazines while still matching your preferred jump to the lands.
- As a 7mm Remington Ultra Mag reloader, owning the Hornady Lock-N-Load Modified Case (B7MM) lets you turn your seating depth measurements into practical, repeatable performance gains for your rifle.
The Hornady Lock-N-Load Modified Case (B7MM) in 7mm Remington Ultra Magnum stands out as a practical choice for precision focused reloaders who want a dependable tool for seating depth setup and chamber specific load development.
| MANUFACTURER | HORNADY |
| CALIBER | 7MM RUM |