I shoot Ruger 77 tang safety rifles. These rifles to not have a "firing pin/striker pin" block on them. If the trigger is set too light, and....the rifle is dropped the rifle is going off. I set my triggers for hunting and nothing more. When I have a trigger set to my liking, I use a rubber mallet and hit the stock and receiver quite hard with that hammer and from all sides, not just from the bottom. I've not had any issues using this method. What I have found with the Ruger 77 is that "IF" I want a light trigger I change the factory trigger out for a Timney, again never any issues with Timneys and light trigger pulls.