Being an Alaskan I,m pretty much a fan of self determination ....... Someone wants to adjust their trigger , go ahead on er .......... I have adjusted quite a few triggers on M77 mkII rifles ,but it is . Just the simplest thing to install a Spec Teck , Timney , Moyers , ect trigger ... Get one ... It is easy to change springs in a Ruger trigger , but the spring serves more than one function ... Get too light a spring and the sear won,t rise up fast enough with enough force to engage the cocking piece .......... So a replacement trigger is a great idea ...........,,. Most all gunsmithing is just mechanic or machinist work ....... They are actually veru simple peices of equipment to work on ... But most people are scared to ........................