Ken, when you're shooting from the bench, you are trying to squeeze every bit of accuracy out of your loads that you can get. Resting the rifle as close to the hinge as you can, resting your cheek in the same place for every shot, putting the same pressure on the stock with your cheek, trigger squeeze and follow through, breathing etc are ways of getting the most accuracy out of your Handi from the bench.
When you are hunting, you aren't shooting groups for accuracy. You're trying to hit the vital area on the game you're hunting which may be anywhere from eight inches to fifteen inches in diameter depending on your game. So just hold the rifle however is most comfortable to you.