What it costs to swab a load means nothing to me. I am just not someone that finds having to swab a barrel between shots that big of a deal. Most the time I want the barrel to cool down anyway. I normally swab with dollar store window washer fluid, and cheap patches or an old T shirt. Hardly a large money item over the years. If I were really cheap, I could swab with simple tap water.
I am far more concerned with it burning up the face of the breech plugs. But I suspect with the new Lehigh Conversion in the Knight, and the Genesis with a full cover primer this will not be a problem. Also I really think having to drill out a breech plug as a PITA. But these are all things I am willing to suffer through to shoot the powder.
And I will make sure to use a tight fitting sabot and compress the powder charge. Thanks for that reminder.