2 years ago i was hunting cow elk with a .338, a cow caught me off gaurd at 20 yards away and lets just say she dropped hard and fast. ive only had one deer and elk drop with my.270 right away the elk was a shoulder lung shot with 150g this year and a deer last year with 130g same style of shot. both only close to 100yrd out. i think another big diff in this is iff they are alert and excited or have no idea u r there. when they get hit not knowing somethings up i think the adrenalin hasnt had a chance to keep them goin.... idk just an idea. good topic