If you make slim rifles like I do, then fitting double set triggers can be a real challenge. I usually have to grind the bars down to less than 1/4" high. In addition to that, I quite frequently have to bend the sear bar up. Of course, the sear must be bent red hot and then re-hardened and tempered. It takes a good bit of bending and fitting to get the sear bar bent just right. It has to be bent in the right place and usually must be bent both up and forward. If grinding down the trigger bar and bending the sear bar up doesn't quite do the trick, then I will add a travel limiting screw to act as a stop for the spring. Usually, this screw goes in the trigger plate between the bow spur and the grip rail. If you just need to take some pressure off sear bar, the additional adjustment screw in the trigger might be the best first step. How you proceed just depends on your particular lock, barrel, and trigger combination.
The most time consuming adjustment is bending the sear bar, but may be necessary with some small barrel and large lock combinations such as a Chambers Late Ketland with an A or B profile barrel. That combination doesn't give you much space if you make the barrel channel web as thin as it should be. By doing all the things I mentioned, I can get an arrangement that is safe, provides a couple ounce set pull and a two pound unset pull.
