This is more of a chemistry question than anything else. I have run across several quotes that state that you can completely fill salute casings with the "military" flash composition. Conventional wisdom on all other compositions is to leave some space. On the surface it would seem that the reactions would generally be the same with similar compositions. Is there something in the added chems from standard flash that would prevent or minimise blowout with the military formula? Or is this an example of internet BS.