The Quantum Bullet of Scott Evil

At MarsCON, I learned that Captain America (the Steve Rogers version, as opposed to the current Bucky Barnes version,) was _not_ shot and killed by a regular bullet.

No, apparently, Red Skull being the sort of evil overlord who tells people his devious plan with exactly enough time for the hero to thwart it, decided rather than just killing Cap dead (the simple option), he'd have the brainwashed Agent 13 shoot Steve with what Brian Thao Worra called a "quantum bullet" in order, I gather, to ...