Re: y the misfire?
Dud rounds are uncommon, but you will experience them once in awhile.
If at the range, wait that 30 seconds and then hold the gun sideways with the ejection port pointing down and work the action quickly.
If you are in a self-defense situation, do the above without waiting the 30 seconds.
There is a basic idea in cleaning and lubricating a gun and its action.
Clean all the fouling off and swab out any grit, insects, birds and gophers out of anything you can get a swab to.
A part that just sits there, it gets a light coating of oil.
A part that rotates or pivots or is pivoted upon, it gets a light coating of oil.
A part that slides against another part, it gets a light smear of grease (I like Lubriplate.)
For suporting parts (frame slide, magazine, etc. I like any of the good gun oils. Lightly is the watchword, here.
For pins, rockers, switches and such I like any of the good gun oils or, for rainy days in the field, a little transmisson fluid.
For sliding, rubbing parts I like a little smear of Lubriplate.