I just got a marlin 917v on a trade. At first it was doing ok then misfired about once every mag, now wont fire at all. Shot about 25 rounds total. When you load it up and pull the trigger, the gun snaps and the firing pin hits the primer, but wont fire. Went through two full mags with no shots fired. Also, it feels like the bolt is hard to close and open, dont know if this is just because of the firing pin snapping and round not firing or what.