I have a 7mm Rem Mag Sendero that was made in 1994. I bought it last year from a widow of our hunting club member. I have shot about 50 rounds through the rifle without any issues. Today, when I flipped the safety off, the rifle fired. I open the bolt, extracted the brass and when I closed the bolt back to the down position, the rifle dry fired again. I checked the trigger pull with a trigger scale and it's set at 2 lbs. The previous owner may have messed with it or it may have come from the factory that light. Should I take this to a gunsmith and have him try and adjust the trigger or just install an aftermarket trigger? If aftermarket is the way to got, what brand/model or part number trigger should I buy? Any help would be greatly appreciated.