Hope this helps answer some of your questions, thanks for taking the time to read my ramblings.
DJH
It does help. Thank you for the information.
I think I'm going to pursue loading the heavier weights. I believe 2000 ft/s with both the shortened 535 A-Frame and the 510gr CEB solid should be possible within the .348Win pressure envelope.
When I have information (either success or failure) I'll post here.