Please check your trigger and make sure you have the spring seated in the notch of the adjustment screw, if not it may slip. You also need to make sure you have it adjusted so that the leaf style spring still has an arch in it. Without enough arch in it it can be dangerous. Also you need to degrease and lock the adjustment screw down with loctite or nail polish to ensure no unwanted self adjustments under recoil. These are lessons best not learned the hard way.
The best way I know of to lighten up the pull on a lawyer trigger is with a piece of piano (music/spring steel) wire from a local hardware store of .040 or a little bigger bend it with pliers to the shape of the original spring and install it with a little arch in it.
I cant remember who but there is a member here that'll send you a piece of wire if you send them a self addressed stamped envelope.
Good luck and be safe :)