Having had my shooting day cancelled, I had to play with something so .... (I have had a good day by the way) I tested a full-house load with a hard cast PPCBoo in my 'test tube'.
210gr on top of 42gr AR2209/H4350 in a PMP case. (The case may not mean much to most but it has a thick wall and holds a whole 3gr less powder). The case was neck sized.
Penetration was ±250mm (less than one foot).
Weight retention was 125gr (60%).
Pressure would be around what I would aim for with J-words i.e. 'normal'.
Here is the result alongside a rejected boolit - due to patch cut through at the base.
Beautiful rifling impressions on one side.
Disaster on the other side!
I can only guess that the patch cut through on the second boolit at the base. There was no sign of it as with the first boolit. The case neck doesn't seem to have expanded on firing!