Quick Answer
For optimal performance with the .280 Remington on mule deer, essential case preparation steps include chamfering, deburring, and sizing to ensure proper seating and extraction of the bullet. This process also involves inspecting the case mouth for any blemishes or imperfections.
Case Preparation Basics
When preparing .280 Remington cases for hunting mule deer, start by inspecting the cases for any visual blemishes or imperfections. Chamfering the case mouth is crucial to prevent case head separation and ensure smooth chambering. Use a chamfer tool to create a 30-degree angle on the case mouth, extending 3/16 inch from the rim.
Deburbing and Sizing
Deburring the primer pocket is essential to prevent primer pocket oversizing and ensure consistent ignition. Use a 1/4 inch drill bit to deburr the primer pocket, taking care not to remove too much material. Next, size the case to ensure proper seating and extraction of the bullet. For .280 Remington, a 7/8" case length is ideal. Use a case trimmer to trim the case to the desired length, taking care not to nick or damage the case.
Final Preparation
After chamfering, deburring, and sizing, inspect the case mouth for any remaining blemishes or imperfections. Use a case mouth deburring tool to remove any sharp edges or burrs. Finally, inspect the case for proper sizing and seating of the bullet. A good rule of thumb is to ensure the bullet is seated 0.030 inches below the case mouth to prevent over-expansion and ensure consistent accuracy.
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