Ok - I'll make it simpler.
I get a brass mfg to make me some brass I designed in .345 Superwisbanger caliber. (or .123 Humdinger)
Get the biggest gruntiest action I can get and work some loads up as per you would with any other caliber, ladder, chrony data, measures cases, primers, action signs etc etc
When do you stop, and why - your pressure gear says 200,000psi (stupid number I know), but everything else is just sweet - no signs whatsoever of any issue.
Cases lasting multiple firings, no expansion, dont even need to FL size, everything is MINT
You fire a few more hundred rounds and still O for awesome.
Is there still room to go further or not? if not then why? and if yes, now where to you stop?
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