I have done my first tests of the BBs, some I purchased and some were donated by others.I have created a table showing the results to date. the table measures roundness, polish and how the BBs shatter. Most BBs split in half and are reasonably safe some like the Nuprols have a tendency to splinter hence their table position.   The List of BBs I have tested to date, 10 is good 1 is worst.   G&G      PSBP      0.20        5.95 + - 0.01        actual 5.96           roundne