I can't imagine it helping any...certainly not enough to justify the hassle of even carrying the darn stuff around with you...!!
Sorry but I just think that fillers such as corn starch, cream of wheat or whatever are just bad ideas. Even in cartridge guns it's a bad idee. Seems to me that at the very least it's going to increase fouling. There's enough fouling to go around from just the BP, or even the fake powders...why add burnt CORN STARCH to your bore??
A very better idea is to use Wonder Wads. They will protect the patch, reduce fouling and sometimes even improve accuracy.
As far as water proofing I can't imagine moisture getting past a tightly patched ball. My own theory is that powder very rarely absorbs moisture "from the air", but rather main charges, prime, and even caps are fouled by oil and water left over from the cleaning process, and the failure to completely dry a gun out before loading...I suspect water and oil sometimes "creeps" out of the breech plug threads and fouls a main charge...probably depending on how well the barrel was breeched, and how well the threads are cut, match each other, etc.
Well there's probably much more than you wanted to hear!!
:yakyak:
Rat
