Good a few things going on here.
First is your lot of powder.
You are getting pretty fast speeds, for that charge weight. This means that your powder is burning rather quickly, compared to current Hodgy stuff. So at least at your upper end, those are stout loads.
We really need a picture to see specifics. Cratering without piercing?? Piercing is a problem.
Just cratering can be several things. Can be weak spring and drag on the primer. Could be sloppy pin/bolt face clearance. Or could be nothing.
Too many people say that you can "read primers for Pressure". That is about as accurate as seeing a tire print in the snow and saying something heavy went through it.
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