Fired for first time my axis Creedmoor rifle. I fired 10 rounds today, just to try to sight in. Starting with the first shot the bolt would turn, but would not pull to the rear. I had to wait after each round several seconds and several tries to turn the bolt before spent case was finally ejected. I tried two manufacturers today, federal premium 130 grain and an unknown manufacturer with same results (both otc, no super loads). Any ideas? I'm gonna clean the rifle and try again soon. This time I'll try other manufacturers. Thx for any ideas?