Re: y the misfire?
You always want to clean off any fouling, but then you do want to lubricate it with a light coat of gun oil.
Gun oil serves two purposes: it lubricates moving parts, and it prevents rust from developing on the metal. Both of these are very important, so it's important to keep the gun well-oiled.
However, be careful to make sure that you use a light coat of oil. If too much oil is in there, it will pick up dust, fouling, etc. really quickly, and it can cause the gun to jam up.
Feel free to ask any other questions you have. I don't have experience with any of the three you have, but there are plenty of people here who work with guns for a living, so you're sure to get an answer pretty quickly.
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