I guess I bought the only bad NEF rifle they made.I bought two NEF rifles new in the box at the same time a 243 win and 223 rem.The 223 was a good shooter never a problem BUT the 243 action would open nearly every time I shot it using any factory ammo.I sent it back to factory they returned it "nothing wrong with this rifle".I took it to range same thing happened.A guy shooting next to me offered me a case of Budweiser and some ammo for it.I took my scope off and handed it to him and never looked back.I talked to that guy later said he had the same problem and just swapped it off.I had a 22 hornet years ago and it was a real good gun as was the 223 rem but this one was a real loser. I just got a bad one I guess.