JUDSA BOOLITS???? need info

Hey everyone i been searching a bit and im having a hell of a time finding any information on these "boolits" i got from the gun show. i realized i dont know the hardness on em... anyone have any ideas im looking to make some ruger only loads with then. there RNFP 250gr theres a ##153 on the bottom of the label. ill be using unique powder. any advise?! thanks all

If you shoot a lot of cast bullets, especially from different sources, I would absolutely recommend the the Lee hardness tester. http://www.midwayusa.com/product/731364/lee-lead-hardness-testing-kit

It's really easy to use, it's not all that expensive, and it gives reasonably good results.