A pillow sandbag goes on top of my bench rest pedistal. The rest is cranked up, and my left hand goes on the wide bag. With the butt plate firmly against the shoulder, and elbows on the bench, this is very similar to my sitting position, but steadier.

http://www.sinclairintl.com/cgi-bin/category.cgi?category=RIBBRBOB&item=BAG23&type=store

My walking stick has a loop of rope at the top. My hand goes in the loop, and grasps the forend of the rifle. The position is exactly the same as shooting offhand, but steadier. The walking stick, homemade of oak, goes hunting with me.

In all practice sessions, the gun is held in the two hands, and the butt plate is to the shoulder.