Wolff is good, Wilson is good. I use both, single six through bisley super blackhawk. I prefer replacing both hammer spring and trigger spring. 30 ounce trigger spring seems standard. I like a 17-18 pound hammer spring. I usually stone the sear surface on the trigger when I'm in there and reduce engagement / smooth up the notch on the hammer as well. I generally look at the factory hammer spring with the hammer cocked to see if it is binding / stacking. If not, I'll cut the aftermarket spring to the same length. If it is stacking at factory length I'll take a little more off yet.
Tom
