Gunzilla. Best CLP I have ever used, and it works best as a dry lube. Wipe the excess off, and you can bury the shotgun in sand without any of it sticking to the gun. I have had zero operational issues cause by lubrication since I started using it. Good enough product that I have the smith at my LGS order it for me a gallon at a time.
This is the only product that I have found that I do not need to soak into the fried on Pyrodex in the barrel of my Wolf after shooting it. After applying it once, the burned black powder does not stick to the inside of the barrel. truely a great product.
Here's a link to their home page: http://www.gunzilla.us/
check it out.