well I know where the brass chips in the bolt came from. fired three rounds, everyother one fired. Where the firing pin hit the round is now a hole with pieces of primer missing, exploded backward into the bolt. The shells that did not fire have small dimples in them, second picture. See pictures.
either the primers are bad, the fireing pin is sticking a hole in the primer or the pressures are too high. The ammo is PMP, made by PRETORIA METAL PRESSINGS A DIVISION OF DENEL (PTY) LTD REPUBLIC OF SOUTH AFRICA.
Has anyone tryed to make a rivet sqeezer by grinding out the jaws on a 48" bolt cutter. I have one I never use anymore. I have several rivet tools I used when farming to rerivet sickle sections on sickles. They form good round heads.