Is it a new revolver? If it's new, I'd do what Strawhat/Kevin recommended. I've got a pair of 686s and they "break in" after enough cycles. If it's an older revolver and it's already "broken in", additional cycles may not change things.

Changing springs are controversial. Some folks swear by it, others claim it reduces reliability and could potentially create an unsafe light single action trigger pull. I don't have an opinion in either direction.

Wilson, Apex, Wolf all make spring kits for the L frame. You'll have to remove the side plate. You can find how to videos on you tube.

You can also have a gunsmith go over the revolver and remove any toolmarks and smooth/polish the critical interfaces in the action. I'd recommend having a good gunsmith do the work. I used a local guy who has since retired. I'm sure some one here can recommend one to you.