I just received a vintage BP percussion musket. Happy with the purchase but have a bit of a problem. The first thing that I checked upon delivery was the bore length to the vent hole using the ramrod as a gauge. Guess what? There is a powder charge in it. I've removed the plug of tow along with a few pieces of shot and there is a second cloth appearing wad (I'm using a screw type ball/wad removal attachment on a synthetic ramrod). I've gotten to the powder charge and have broken the top layer up and removed it but the screw doesn't appear to be working very well now - can't seem to get it to screw into the powder. I know BP is a mixture that includes potassium nitrate and it should be water soluble. Would something like Ballistol 2:1 with water work to soften the plug?