So what would Tiberius even do for ASTM testing? There is no standard that would cover their round is there? Thus until people go and create a standard for non-sperical rounds that the FSR could even apply to, Tiberius can do all the testing in the universe and it still won't pass the ASTM spec until someone specifically goes in and writes regulations that cover such rounds. That all is to say, from what I've been told the word 'spherical' is specifically the nomenclature that precludes the non-spherical First Strikes from being acceptable.
That's why the rounds aren't ASTM spec, because they are specifically inapplicable to any standard on the books.
But if no-one ever made or marketed anything that diddn't fit the current specs, then there'd never be demand for such a spec in the first place.