RE: Newbe w/ lots of Questions!
Yep.... Bore Butter is for patch lube. Gun oil protects the bore from rust better than Bore Butter/Wonderlube 1000. If you make a mistake cleaning/storing with Bore Butter by applying it over trapped moisture in your rifling, rust will form overnite. Also... the use of Bore Butter with sabot/bullets is highly discouraged. It very easilyturns goodshot groups into bad ones ... especially in colder weather when it thickens fast from outdoor exposure.
If I didn't keep a small tube of Bore Butter laying around to use occasionally as a wonderwad in the hollow cavity of a few bullet bases to reduce gas-cutting, it would end up being tossed into my garbage can.