IDO BELIEVE THAT THESE ARE THE ONES THEY CONTRACT FROM http://www.prbullet.com/
I did not have much luck with them the harder I pushed them the less accurate they shot. But remembering that each gun is an individual they might do ok for some one else. If they are pure lead its difficult to keep from deforming them when loading and they have an upper limit on speed or the velicity it self can deform them. Lee