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5. Generate a consistent and repeatable ignition sequence both spatially and in time
(more likely with certain case configurations, such as short and fat);

6. Create a uniform delay between primer ignition and propellant ignition (seems possible).

One might speculate that we could identify other salient factors but this list seems reasonably complete and should certainly illuminate the importance of primer function to ballistic uniformity. The problem is, no conventional priming system (Boxer, Berdan or rimfire) can accomplish every prerequisite requirement to ultimate ballistic uniformity in typical cartridges with typical loads.

Before proceeding, with the goal of assuring that the average reader may follow the content of this essay, a few definitions might be useful:

Brisance: Explosive violence or shattering effect – contrast with "total heat energy."
Condensation Heating: Heating of a solid surface by condensation of gas into either liquid or solid state upon said surface – this is the primary means whereby modern primers ignite "propellant" granules.