This is something that I copied from the old H&R board before it shut down. What do ya'll think about this guy's advice?
Guys, there have been all sorts of postings on how to clean your muzzlelaoder and not have the barrel rust. Suggested are T/C bore butter, WD-40, PAM cooking spray and all other sorts of solutions. Here is something I picked up, I think from a T/C site:NEVER USE WATER OR A PETROLEUM BASED SOLVENT IN YOUR BORE!
I've been shooting muzzeloaders longer than I can remember. I started out with the hot water technique and got rust. Tried various bore cleaners, and got rust. No matter what I tried I got rust. Then one day I ran across the above hint, and it workes for me. Since changing to a non petroleum sovent and not cleaning my barrel with water, I've never had a problem with rust!I happen to use Tradtions WonderLube 1000 Plus, but any solvent which does not contain petroleum should work. I have both the liquid solvent and the pre-soaked patches. The 2" round pre-soaked patches are a great convenience and a time saver. They are a little pricey to start, but when I start to run low I throw some dry round patches in the jar & pour some WonderLube on top, so the jar never runs out.Use whatever solvent you can find as long as it says something like "all natural ingredients" on the label. If it says anything about containing petroleum or looks watery, keep looking. I just clean my bore alternating with soaked & dry patches untill it comes out clean, then run one more wet (but not soaked) patch down the bore to thouroughly wet it and put the gun away. No more rust!This works similar to seasoning a cast iron frying pan. If properly seasoned and NEVER washed with water, a cast iron fry pan will never stick & never rust. My theory as to why this works is that if you clean you bore with water, some water will work down into the pores of the metal (yes, iron and steel have micro pores). Even though you think the bore is dry, the water is still there. When you then swab the bore with a petroleum solvent, the water remains in the pores BELOW the solvent, where it continues to create rust. The petroleum only serves to seal in the water.When you clean and seal your bore with a natural (water soluable) solvent, the water and solvent will mix, the water wicks to the surface and is evaporated. Then the solvent fills the pores and remains there protecting the metal. Unless, of course, you later clean the bore with water, which washes the solvent out of the pores, the water fills the pores and the whole rusting process starts over.Note that if you had used water to clean your bore in the past, it may take a couple of firing-cleaning cycles to remove all of the imbedded water until your bore is thouroughly seasoned.Hope this helps! -- Lee