The 35 reloads that I shot where 240gr Meister cast bullets with 21gr or H110 powder. I think that what seemed so dirty to me was the residue left from the lube on the bullets themselves and being burnt by the next round that came through. Idunno for sure, thats why I posted this to you guys who are more experienced than I. I dont think that it was lead fowling or powder residue, it was just a greasy dirty stuff that came out when I cleaned the gun. The lube on these bullets is a blue waxey substance.