I had a lightbulb moment. What if I am pushing these lee boolits too hard? I still need to try and trap some one of these days, but what if I am just pushing them harder than they can take. I suppose I could try to cast some out of pure lino or something, but the other side of it is to try and slow them down considerably. I'm thinking I will try some loads with Unique and just see how they react.
I did try some loads already with Unique, early on with those softer boolits. But I did not try to actually develop a load with it. I wanted to try and reach a certain velocity, but now I am wondering if that is blinding me to actually trying to develop a load the gun likes. Something to think about for sure.