After you have run an open paper clip inside the plug - then used a sewing needle to make sure the flashole is open, follow these steps. Inside of the plug should see your hottest tap water while holding the plug with a pair of pliers -- thenautomotove brake cleaner spray -- using the long, red/yellow straw-looking adapter that attaches to thefinger nozzle. Keep away from your body when spraying - do over a laundry tub or driveway -- cuz' it may shoot backwards and sideways too. It's important touse frequent short thrusts in there.

The outside should be done first. It should see Q-tips and those stiff, wiry pipe cleaners dampened in solvent for the 209 primer area -- then any household spray like 409, Simple Green, Fantastik... etc.. with a toothbrush for scrubbing the outside of the plug.

Whendone inside& out, try that sewing needle one more time - to make sure that tiny hole is open. I then leave my breechplug flashhole-up overnight on a shelf - the cleaned/oiled ML nearby standing up with muzzle-down and a foldedpaper towel under the muzzle to catch oil run-off. Next day, I'll install the plug - then place the ML in the gun safe muzzle-up.

I am meticulous with my guns. I probably 'over-clean' them. Takes me a long time to clean a gun - because I am so thorough.

Thompson Center Arms -- Triple Se7en Powder -- Buffalo Bullet Co.