The Vanguard trigger is adjustable down to about 2.5 pounds...at least it is on mine. Don't take my word for it, just go to Google. You may find some mis-information and outright b.s., but a little common sense goes a long way. Over travel and creep are not as good as can be had with some aftermarket triggers but it's acceptable to me for a hunting rifle.
I gave mine 3/4 turn in after the point where it would not stay cocked. Half a turn may be safe on yours or it may take a full turn.
There are two screws. Just make sure you play with the correct one only and you'll be fine.
Back to Google......