I've used the Cain singleset trigger on 3 rifles. It is by far the most difficult of all the triggers I've used to get in good alignment. U usually have to do some heating and bending on the sear arm. My .54 Beck has one on it and I've used it for 5 yrs now without problems, unless I forget to set it before firing. Many don't like them because they don't fire unless set! But like all things if you use it all the time, it becomes natural.