Just had an interesting experience with a Timney 512 trigger that I Installed on a new TAC 30 and had problems getting it to engage the firing pin on each effort to cock the bolt. If the safety was on then would work fine for 6-10 times and then fail. Timmy said trigger was set to light. After a couple days different attempts to resolve I took it to Timney and after 45 minutes effort they couldn't get it to work either. With professional persistence the tech did finally get a Calvin Elite trigger to work by substituting several parts to finally solve the problem. They said their triggers won't work on the Stiller Tac 30 action but were very determined to resolve my issue which I greatly appreciated. I have three other Tac 30's and they have Jewell triggers. If you're needing a trigger for a TAC 30, don't buy a Timney.