I personally would not go deer hunting with a 223. My preferred round is the 30-06. You should have a round that is capable of penetrating a trophy deer's body from ass to chest and I don't think that the 223 is capable of that {even with bonded bullets}. I would suggest using a rifle with premium bullets from 125 grains on up.
My aim point on that deer in the photo: Would be the far left leg, two thirds up from the bottom of the chest, for a left shoulder shot...miss high --- you hit the spine, miss low --- hit the heart, miss left --- you hit the liver, miss right --- you shoot the neck spine; if you're lucky.
My aim point on that deer in the photo: Would be the far left leg, two thirds up from the bottom of the chest, for a left shoulder shot...miss high --- you hit the spine, miss low --- hit the heart, miss left --- you hit the liver, miss right --- you shoot the neck spine; if you're lucky.