I wouldn't bet my life, or an ethical shot on game, on a picatinny mount returning to zero unless it was specifically designed to do so.
If you want to QD and return to zero, you really need to invest in rings or bases that are designed for that.
LaRue, ADM, and GG&G make decent one-piece QD mounts.
Leupold and several others make QD rings.
-- John