You can do a "fluff and buff" but spring replacement can be iffy. Rimfires are real sensitive to that. Apex sells a J-frame spring kit. I put one in a M638 and really like it. The kit cost around $30 delivered. You could always try it.
I just went through this with my new 351c. Got the 351c 317 specific spring kit from Wolff. Installed new mainspring and rebound spring. 50% fail to fire rate. Dealer that sold me the kit said to only change the mainspring. Leave stock rebound spring. Tryed that. Now 30% fail to fire rate. Gave up and put it back the way it came from the factory. Now 0% failures. I would leave it the way it is unless you have a competant gunsmith smooth the inards of the gun.