RCBS 7mm Backcountry Die Set

The RCBS 7mm Backcountry Die Set is engineered specifically for reloading the 7mm Backcountry cartridge and its steel alloy case. Because this SAAMI-approved cartridge operates at pressures significantly higher than conventional rifle cartridges and uses a steel alloy case rather than brass, the reloading process differs from traditional brass-case reloading in several important ways. Full 7mm BC reloading instructions below.

The three-die set includes:

• Neck Sizer Die: sizes the case neck only
• Expander Die: expands the case mouth to proper diameter and applies a slight flare (bell) so the bullet can be seated
• Taper Crimp Seater Die: seats the bullet and applies a taper crimp in one operation

Because this set neck sizes only, cases must be reloaded for the same rifle they were fired in.

Warning – The 7mm Backcountry is a high-pressure cartridge that uses a steel alloy case specifically designated as reloadable by the manufacturer. Strict adherence to verified load data and safe reloading practices is required. Failure to follow proper reloading procedures, published load data, or storage guidelines for this cartridge and its steel alloy case may result in property damage, serious personal injury, or death.

PLEASE READ AND FOLLOW THE ADDITIONAL IMPORTANT INFORMATION BELOW.

The 7mm Backcountry is a high-pressure cartridge that uses a steel alloy case specifically designated as reloadable by the manufacturer. Strict adherence to verified load data and safe reloading practices is required. Failure to follow proper reloading procedures, published load data, or storage guidelines for this cartridge and its steel alloy case may result in property damage, serious personal injury, or death.

1. Gather, sort and inspect your fired cases.
    a. Use only 7mm BC cases that are designated as reloadable by their manufacturer.
    b. Reload cases only for the firearm they were originally fired in.
    c. Inspect each case before reloading.
    d. Discard any case showing cracks, splits, fractures, bulging, dents, deformation, flaking or peeling of the nickel plating or any other visible damage or wear.
    e. Sort your cases by length.

2. Clean cases.
    a. Remove fouling and debris using safe methods for nickel-plated cases.
    b. Avoid harsh solvents, abrasive tumbling media or ultrasonic cleaning.
    c. Do not deburr primer pocket.
    d. Take care not to remove plating during cleaning.

3. Do not trim or deburr.

4. Lubricate cases with a wax-based lubricant evenly to the outside of each case before resizing.

5. Neck size the case.
    a. Run each lubricated case through the neck sizing die. Set the die per RCBS instructions before sizing.

6. Flare the case mouth.
    a. Run primed case through the expander die to gently bell the case mouth. Apply only the minimum flare needed for the bullet to enter the case mouth without scraping the bullet jacket when the bullet is seated.

7. Reprime the case.

8. Charge the case. Use only verified, lab-tested 7mm BC load data.
    a. Always follow published reloading data. Peak Alloy cases do not exhibit traditional pressure signs. Start at the published minimum load and work up in small increments. Never exceed the published maximum powder charge. Be mindful published data for the 7mm BC is high pressure loads for Peak Alloy cases only.

9. Seat the bullet.
    a. Placing a bullet in the flared case mouth, press into the case with your seating die with one smooth continuous stroke to correct COAL specified in your load data. Ensure the bell/flare is removed from the case by measuring the case neck and the very end of the case. Do not stop partway and restart or seat with separate pushes.
    b. During seat/taper crimp, crimp your case mouth .001"-.002" smaller than the neck at the base of the bullet.

10. Final inspection of loaded rounds.
    a. Verify COAL
    b. Confirm bullet seated correctly (straight)
    c. Confirm primer properly seated (flush or slightly below case head)
    d. No damage to case body, neck, mouth or case’s nickel plating
    e. Removal of all lubricant from your rounds

11. Store ammunition properly
    a. Store finished 7mm Backcountry ammo in a cool, dry location away from heat, moisture, direct sunlight and extreme temperature swings. High-pressure cartridges may be more susceptible to degradation from improper storage conditions than traditional ammunition. Periodically inspect stored rounds and discard any showing signs of corrosion, case damage or primer deterioration before use.

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