Trimming and Case Prep

← Reloading A-Z: all steps

Brass stretches as it is fired and resized. Cases that grow beyond maximum length can pinch the bullet in the chamber and raise pressure, so measure every case and trim to a consistent length.

After trimming, chamfer the inside of the case mouth and deburr the outside so bullets seat smoothly. Many precision loaders also uniform primer pockets and flash holes, and some benchrest shooters turn necks for perfectly even wall thickness.

Pick the steps that match your goals, then do them the same way on every case. A power case prep center makes this stage much faster when you are loading in volume.

← Step 5: Resizing  |  Step 7: Priming →