Recommended by Mike Venturino in his book "Black Powder Cartridge Reloading Primer" -about cartridges obviously, but carries over to cap and ball:
Cleaning right after shooting:
Prestone Advanced Formula Antifreeze + distilled water (50:50)
Final cleaning before putting away until next shooting:
NAPA auto transmission fluid (great rust protection, better than any gun oil)
Last edited by jolasa; January 19, 2011 at 12:52 PM.