Quick Answer
To clean 7mm SAUM brass after reloading, use a mixture of 50/50 water and CLR in a ultrasonic cleaner, then rinse with hot water and use a brass brush to remove any stubborn residue. Alternatively, soak the brass in a 1:1 mixture of white vinegar and water for several hours before cleaning. Dry the brass thoroughly.
Ultrasonic Cleaning
When using an ultrasonic cleaner for 7mm SAUM brass, maintain a temperature setting between 80°F and 100°F (27°C to 38°C). Fill the cleaner with a 50/50 mixture of water and CLR, making sure the brass is fully submerged. Allow the cleaner to run for 15-20 minutes, then immediately switch to a rinse cycle with hot water. This process effectively removes any residue and fouling.
Hand Cleaning with Vinegar Soak
For more stubborn residue, soak the 7mm SAUM brass in a 1:1 mixture of white vinegar and water for several hours, ideally 12-24 hours. Remove the brass from the soak and use a brass brush to gently scrub away any remaining residue. This method is particularly effective for removing stubborn carbon fouling. After cleaning, dry the brass thoroughly with a soft cloth to prevent water spots.
Final Touches
After cleaning and drying the 7mm SAUM brass, inspect the cases for any remaining residue or imperfections. Use a case gauge or caliper to ensure the brass is within the desired tolerances. If necessary, use a file or sandpaper to remove any imperfections or burrs from the case mouths. This attention to detail ensures your 7mm SAUM brass is ready for reloading and firing.
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