I had issues on r45 blue gun, worked on purple schim for 4 days and quit, unlocked most 50 purple guns for tanks dds and healers, but most of my purples came from under 10-15 blue synths. I have purples from lvl 21-50 for pistols and popped a good blue schim for rifles last night so will be workin on those next.( minus the 45 purple :/ )