I bought my Scar 17s 9 months ago. I took it out to the range and would not fire. Firing pin left a light imprint on the primer of the round. I took it back to the dealer and they told me packing grease was not allowing it to fully punch the primer. So, it sat in my safe for many months and I took it out to run some ammo through it and could not have any enjoyment because it would not fire again.Any Suggestions?