I've been usin' #13 for many years. I stick a toothpick in the flash hole and shoot a good shot of 13 in the barrel, put my thumb over the end of the barrel and tip the rifle around to wash it back and forth in the barrel, lean it up against a tree and proceed to clean and oil the lock while it simmers. Then I put the ramrod with a wet patch of 13 in the barrel and pull the toothpick and shoot the black manure out the touch hole. 12 - 15 patches later the barrel is clean and dry, apply Birchwood Casey's Seath and I never have to look at it again till the next time I shoot and I never get rust.
The only time I had any rust was when I went through the barrel process but got into a hawk and knife competition and left the rifle sit for about an hour before I got back to it and then it did have a little rust, but it was removed very easily and was not the fault of the #13, it was my own stupidity for letting it sit so long.
But this is just my .02
The only time I had any rust was when I went through the barrel process but got into a hawk and knife competition and left the rifle sit for about an hour before I got back to it and then it did have a little rust, but it was removed very easily and was not the fault of the #13, it was my own stupidity for letting it sit so long.
But this is just my .02