Four years I did that with a cheap 6-24 scope on a 223. Killed many deer, but I missed several opportunities because the magnification was so high it was hard to distinguish deer from brush at close ranges. I don't have a problem shooting the ones in the clear as I can draw ill my gun and it's pointed exactly where I want it so I don't need to find my target...kind of like instinctive shooting with traditional bow.

The 6x power just takes all the contrast and shape out of deer at close range and that makes it extremely difficult when they are moving. Very few of my shots are at standing deer during midday hours.