ORIGINAL: maineac
Sorry to have left out the powder. I am using Goex Clear shot FFg. I was swabing every third or fourth shot. I would pull the breech plug and swab from the breech out the end, using only patches. I was shooting 295 grain copper plated powerbelts with 90 grains of powder. also any bore brush, I have 50 cal but it is plastic, would you recomend a copper brush?
Ditch the old Clear Shot & buy a brass bore brush. Start swabbing after every 2nd shot if you use 777. Otherwise, I recommend you try either American Pioneer or Goex Pinnacle in 3F only. The 2F is very coarse.
Start all over at the range with new powder. Don't let the barrel overheat & use Windex to swab the bore. Get a good solvent like Birchwood Casey Bore Scrubber 2 In 1 Formula. That stuff willl keep all fouling & residue under control for a very long time.
Just remember to hold your nose when using it... lol