I just tested some sort of.. I switched over this year from Pyrodex to Tripple 7. I was thinking it was non corrosive until some on this BB set me straight. But help me out here with links or something. Because I went on a special early muzzleloading controlled hunt on Saturday (reducing deer pop at a federal installation). I shot once (got a deer, barnes bullets worked great!). This was at about 10am on Saturday morning. When I got home, I didn't feel like cleaning the gun and left it in its case indoors until tonight. I just finished cleaning it at 11:45pm Sunday. Not one bit of rust. And I couldn't find any pitting either. No breech plug on my Thunderhawk but the nipple came right out.. I know when I used bore butter and pyrodex I would have had a nasty mess.....so how long does Tipple 7 take to rust a gun and pit the steel? I can't imagine ever going longer than I just did. I usually clean the evening of the hunt...Thanks!