75yds tops......with my tc 50cal hawken flinter.....thats with a solid rest from the shooting sticks....and the deer is stopped...broadside....and in the open...i can blow up water jugs at 50-60yds every shot.....hitting a paper plate easy.....a deer at 75 is reasonable....maybe even 100....but open sights at 100 isnt me......scope that shot would be nothing......but i dont use open sightts all that much....so i limit myself....and know my limits......