How to Polish a 6.8 SPC Chamber

The 6.8 mm SPC is a intermediate-power rifle cartridge. There are a wide variety of rifles chambered in it, including semiautomatic and bolt-action rifles. Polishing the chamber of any rifle -- regardless of caliber -- may be desirable if the rifle is having trouble ejecting spent casings, or if the spent casings are being severely scratched or gouged upon ejection. Chamber-polishing is relatively simple and does not require any gun-smithing knowledge given the proper steps are followed.

Things You'll Need

  • Cleaning rod
  • Chamber cleaning brush
  • Lubricant
  • Drill
  • Drill bit
  • Empty 6.8 SPC casing
  • Fine grit sandpaper
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Instructions

    • 1

      Point the gun in a safe direction and make sure it is unloaded.

    • 2

      Fully disassemble the rifle so that the chamber is exposed.

    • 3

      Drill a hole in the spent primer of the empty casing. The hole should be large enough to insert the threaded end of the cleaning brush.

    • 4

      Insert the threaded end of the cleaning brush into the casing and attach the cleaning rod from the other side. The casing should secure and should not spin freely.

    • 5

      Wrap the sandpaper around the casing and tape it in place.

    • 6

      Work the casing in and out of the chamber and rotate it as necessary to smooth out any burrs in the chamber.

    • 7

      Wipe the chamber clean of any metal filings and lubricate.