Centershop,, T/C gone beaver..
Screw on the end of a rod,,screw into the ball in the barrel and clamp the rod in a vice,so your not in front of the muzzle, and pull the stuck object out..
When I taught Hunter Safety I dry balled all my M/L for class, over protective yep,but I never have a shot fired>>>and I should how it looked to dry ball a rifle and measure the ram rod...Then pulled them at the end of the class.
I found if I file a slot in the side of the screw,like a self tapping screw, it got a bite quicker and held better,just screw it in and pull.