I have a xr-100 22-250 they have the xb -old rangemaster trigger.It is externally adjustable supposedly down to 1.5 lbs. i turned mine all the way down and it feels like a 5-6 lb. trigger. Is there a way to make this trigger better w/o spending a lot of money ? Trying to figure out whether i should sell it and get a custom action or modify what i have.