I had just gotten started at the local rifle range today when I encountered a problem with my 1500 7mm. The first three rounds were fine, but I couldn't get the forth to fire. The bolt moves easily, but when I chamber a round and lock the bolt in place, the striker does not stay in ready position, moving inward instead. Also, the safety is difficult to move from the FIRE position. Whenever I am able to move the safety, he next bolt cycle will work properly and I'm able to fire. Has anyone else had this issue or have any idea what's wrong?