If. If you are running reloads by chance loading using rcbs dies mine was not fully chambering fully and when using the forward assist it would be sticky while ejecting. The base was not getting fully resized evenvwith th cam over while resizing. Had a small base redding body die ran all through it no more issue. Now it is at about 350-400 rounds so i checked my gas port on the barrel for a 20" barrel. It was .087 approx. Used a #42 .0935 all cycling issues have gone away. Still keeping bolt dripping. May or may not help good luck.