we use BREAKFREE CLP...
in bores of our guns,we use SHEATH by birchwood /casey..

both you can get at wal-mart..

these 2 were only ones that had high marks in tests done on 1/2 inch plates..

i went to olympic skeet trails in arizona..
the only can of lube i saw on tables was BREAKFREE CLP...

i have TRI-FLOW for my mountain bikes when i raced over 15 years ago on chains, it is great stuff also...