Huvious - I'm having a difficult time with the penetration requirement as well- especially form a short. I can possibly see it with a sectional density superior 40gr. solid, but a 29gr. short bullet?

RLI - not the .22 magnum with one of it's thin skin jacketed bullets, but the .22 WRF - with it's 45gr. "solid" lead bullet at 1,450fps!!!