Brownell's sells a replacement trigger return spring that'll lighten it up some. Won't give you the adjustment range of a Remmy 700, Win 70, Tikka, etc,. etc., but you might be able to get it down to an "acceptable" pull.
I've used this man's springs on a few of my rifles, and I've been very satisfied with them and highly recommend them. They're also less expensive than Brownells.
You're welcome. I have been very pleased with his springs and they are less expensive than most others. When I find someone with a good quality product at a great price, I enjoy sharing that info.