Montana Extreme Bore Cleaner.
Get a 25 cent conical rubber plug from the hardware store - heck, get 2, that's a lifetime supply.
Stick the plug in the chamber, tap it in tight with a cleaning rod. Squirt about 3-4 eye dropper's full of Montana Extreme in the muzzle. Take a square of plastic grocery bag and attach it to the muzzle with a rubber band. Turn the muzzle up, then down, then up, then down to coat the bore. Lay the rifle on a level surface and walk away.
Come back several hours later. Remove the grocery bag from the muzzle and pour out the now blue liquid. Carefully run a cleaning rod in from the muzzle to tap out the plug. Run 2 dry patches through the bore from the chamber end to dry the rest of the bore cleaner. If you feel like it, run a patch with some lighter fluid or alcohol on it to completely degrease the bore, or not. Run an oily patch through the bore and you're done.
If the rifle is a real fouler, look at the muzzle in a good light after cleaning as above. If you see streaks of copper (very rare) apply Montana Extreme Copper Killer as described above in place of the Bore Cleaner.
If you had to use the Copper Killer then when you're done apply Dyna Bore Coat once. Then put the Copper Killer away, never to be used again - at least not on that rifle.
FWIW, I use the Bore Cleaner about every 300-400 rounds whether the rifle needs it or not, I'm real particular about that...
