A nice two stage trigger can give the shooter a lot better control over the last bit of "break" before the sear is released or the "hammer drops". I got used to this with shooting my Colt Pythons since I was a teenager where the double action trigger pull would raise the hammer to mid point with the first stage and then a distinctive, but slight, change was encountered that allowed a slight pause, milliseconds, to get the final sight picture aligned and then pull through the second stage with about a 1/2 pound pull to release and fire.

Two stage triggers are really nice for this control.

I have a single stage on a long distance rifle and it breaks with no travel at about 8 ounces of pull. You really have to be ready for that but there is no movement created by working the trigger for the sear release.

The Krag trigger seems to work quite well for the heavy rifle if you smooth out the rough spots. It makes a difference and is quite surprising how well these triggers can work for us after 120 years!