I have a new model 77 in .300WSM that is a great shooter ( several sub M.O.A. 5 shot groups). However, it suffers from about a 15 lb. C.Y.A. trigger used by manufacturers to keep lawyers at bay. I think I will be able to get even better groupings and improved field accuracy if I can do something with the trigger. In the past, I have used a Timney after market on other makes but forget whether this is a DIY job or needs a gunsmith. Any suggests/opinions from those with similar experience? I'm not after a target trigger, just a safe hunting trigger with reasonable let off.