Last year being my first year I've only killed 3 deer. The first I killed with a 30-06 at 80-90 yards ... BOOM/FLOP ... didn't even twitch.
Two others I killed with a 243. One dropped in its place (40 yard shot) and took about 5 minutes to die. The other (30 yard shot) ran a good 50-60 yards before dying.
All 3 were heart shots
Hence my desire to sell my Tikka T2 Lite 243 and get a 308 in the same model