Sourcing unfired cases: is this an alternative?
Eventually you will re-load those brand new soon to be once fired cases no?
I would argue that you should work up loads in what your going to use (once fired, twice fired etc). In the end i don't think it will make one bit if difference if its new or used as long as it is not damaged brass.
No point in sacrificing a perfectly good factory round unless that's what you really want to do, I say shoot it and then recycle that brass.