The Gunshack spring is actually the spring the Varmint Accutrigger uses. After buying several I compared them to varmint springs I had and found them to be the same. The red blade Target Accutrigger also utilizes a different sear, so a spring change will not be sufficient to get trigger pull down to ounces.

One fix that I've used is to buy a target accutrigger off the classifieds on this site. Members are always upgrading to new triggers and removing their red blade Target Accutriggers and selling them. Place a want to buy ad if you don't see any listed. Someone will probably soon respond. It's a 5 minute swap to replace one with the other.