Anyone have their loading lever catch fall off the end of the barrel? Mine did the other day. At the range shooting the OA and havin a good time until it happened. Shooting my pet load of 25gr 3F and a 457rb. Got a good group going, 3 on paper and after the forth shot the lever was just swinging in the wind. now with 4 on paper, 2 still in the cylinder w/caps still in place. So what could have caused this?