Here are two solutions. The first link is forapplying toyour swabbing patches after every shot. Also, using a bore brush breaks-up the crud easier than a loading jag. A good secondary liquid for swabbing is Windex.
http://www.americarx.com/index.asp?PageAction=VIEWPROD&ProdID=4096
The 2nd link is for discarding the tough-loading plastic sabot he has - then using these instead.
http://www.cabelas.com/products/Cpod0012633.jsp
Thompson Center Arms -- Triple Se7en Powder -- Buffalo Bullet Co.
