In December I went stalking red hinds, it was a lovely calm blue sky afternoon. I shot a red hind in the neck at 40 yards roughly. She filled the scope completely she was that close. I shot her in the neck and she went down like a ton of bricks, behind her was her calf and it was at 100 yards. I placed the bullet in its chest and fired with a killing shot. I then looked for the rest of the deer and they'd moved up to a hill out at 200 yards. There was a 2 year old hind (roughly) I shot it in the ribs and knocked the bottom 3rd of her heart off.
First off, I don't really believe you took 3 deer by yourself all in an afternoon. Secondly, what are you doing hunting calves?