Roscoe,

I use no lube of any kind. The barrel is perfecttly clean from the stanpoint of using non petroleum cleaner such as with the TC cleaner or Bircwood-Casey, The barrel is completely clean, dry and free of al substances, except for when its stored for winter. I have not seen a notable difference between the first and second shot when the barrel is 100% clean (lightly swabbing after the first shot).