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!
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What looks like impact damage is actually flame cutting. 
) and that was the fact that the neck had expanded so little that it would not accept another PPCBoo with some difficulty. In short, I might just want to size the rest of those cases to 8.0mm ID (.315"). The patched base shank is 8.1mm (.319"). After managing to 'twist' a few more PCBoo's into that neck, the patch came out shiney and measured 8.02mm (.316"). (The 'twisted in PCBoos seated up on the 'dough-nut'). A repeated firing of that same case will reveal whether the ID will remain stable. Could be useful, no? (It has a thicker case wall and neck than usual).
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That line that runs from about 5 o'clock on the base rim and well into the 'mushroomed' area, is a flame cut on the trailing edge of the land. There is a little dark spot to the right of it which is quite a deep eroded hole - possibly where a flaw existed?
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