Bubba'
I've replaced the hammer return spring on my Compact. I used a Wolffe spring and as I recall, it was a Ruger MkII spring, but I wouldn't swear to that. I don't recall the poundage, but it was lighter than the original. It's made all the difference in the world in the way that gun shoots. It's about 4 1/2 lbs DA and 3 lbs SA. It a pure pleasure to shoot now. I recommend it.
I did the same thing on my 83 and now it's the smoothest, sweetest trigger you ever pulled. It wasn't bad before, but it's absolutely GREAT now.