If you have any intention of using the gun for defense, I'd not. The J frame action does not lend itself to lightening as much as the K,L and you can wind up having to use Federal primers only to avoid misfires.

A slick J frame action should be around 10# DA. I've reduced it to as littel as 7#, but without reliability, and honestly, without allo that much change in the shootability. Practice DA with a J frame is a must to master the little gun.

Since it is so easy to change a a J frame mainspring, You can buy reduced power mainsprings (Brownells) and experiment for yourself if you want.
Remove the grips. Cock the hammer, and put a paper clip in the spring strut. Lower the hammer and remove the spring assembly. Change the spring and install in reverse order.

__________________
Science plus Art