Hi!, I got a 700 PSS in 308. It is a few years old and hasn't been fired since it left the factory. I just recently got it from a collector in perfect condition. I pulled it out of my case the other day, opened the bolt - pulled it back - pushed it forward - rotated it down, and the firing pin didn't lock in the (cocked) position. The firing pin will lock in the rear position if I push on the safety; however, when I release the safety it fires the rifle. My rifle rifle doesn't have the X-mark pro trigger. Is there an easy way to fix this?