I'm going to take a guess and say it sounds like it needs to be given a good cleaning. New Rugers come packed in a heavy oil that will slow down the firing pin, especially after it starts to get some unburned power and "crud" in there. I'd give it a good cleaning, or at least spray it out with good polymer safe Gunscrubber and oil with a light oil and see how it does before I worried too much.
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him should not perish, but have everlasting life.
John 3:16 (NKJV)