Regarding the trigger, I replaced the trigger return spring and the hammer spring on mine. After test firinging, I had one misfire (out of 100 or so) so I put the original hammer spring back in the gun. This lightened the trigger enough for me.
If there is still some trigger creep, have a 'smith who is familiar with Rugers stone the appropriate parts.
As another comment, my Redhawk has a reduced spring, and is 100% reliable, including magnum primers.