Ditto on setting bullet out too far. Did that once and got a loud swish sound. Looked in BORE to see if it was clear and it was clear. Packed up and went home. CHECK BORE IN THESE SITUATIONS. Good point Muddyboots.
Two or three fingers worked for me on one that was flipping a little. Put fingers on edge of forearm not touching the barrel. Closed the group over half inch at one hundred ninety meters.
Good 'ol triple duce. When I was young all I thought about was the big cannons. Lol. Had a friend that could shoot the eyes out of a snake with his .222. After many decades he still has it.