Rugers are pretty easy to disassembe if you have some skills at doing this kind of work. There is a method that can help with the trigger that does not require dis-assembly, but it has its limitations. A couple of variations:

1) Make sure the the trigger sear area is decently oiled. Pull the hammer back, and place forward pressure on the hammer while releasing the trigger. Do it a lot of times. I like to control the hammer fall, but the idea is to put increased pressure and the sear hammer hook juncture, to force the surfaces to smooth some.

2) Seen this variation in Cowboy action "tips", where you do as above, but fill the inside of your frame with toothpaste. The toothpaste acts as a mild abrasive, and repeated cycling will help with any burrs, and will generally polish.

Mostly ways to expedite the process of firing hundreds or thousands of rounds to get that "broke in" feeling. Never done 2, but I almost always do 1 with any gun that starts out gritty or hitchy.

Craig