ive taken both running and standing.....one i wont forget is a doe....my 3rd deer...dad was gutting his he just took...and i was standing there watching.....4 deer came running through our thicket we hunt in...its a growing sappling thicket.....most trees arel ike 4-5 inches thick.....some only an inch.....but its starting to mature....and you can see "only the strong survive" take place....the weak trees are dying out as it matures...neat thing to actually witness....but they were running full speed coming out of someones drive.....i had my 3x9x40 leaupold varixII on 3x....and got on the lead deer and was moving on it like i was swinging a shotgun.....bounded over an opening and took her in the air as she bounded....folded in the air and piled up when she landed.....dad looked at me and was shocked i even shot.....and shocked that i did what i did....perfect lung shot......right where i wanted it to go.....i dont take shots i dont think i can make....and im not bragging....i know myself and know my gun and can shot it.....the deer was only maybe 40yds away...3006....if i know i cant make the shot i dont fire.....i felt that one..and knew i could do it.....and i did it......but you have to know yourself and what you can and cant do.....and follow your limitations.....