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My favorite gun cleaner/lubricant is CLP. For certain weapons I feel need to run a little "wetter", I use RemOil. Bore cleaning is somewhat different; Hoppe's #9 is a good general powder/residue solvent, if you end up with copper deposit issues (typically a rifle problem) it opens a whole other discussion.
If you are limited to what you can find in a hardware store, I used "3-in-1 oil" for many years with no issues.
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