Jerk,
,LOL, I just had too!)
I'm no planet Earth master champ,10 years running, but I see no one has tried to help you. I'll take a stab at it. I'm left handed, so i'll give right handed instructions best I can...
Let's say you were in a back yard somewhere, lying on the ground, prone with rifle on bipod aiming at one of God's critters off in the wild blu'yonder. I'm on the deck, above you looking straight down at your form...
You should not be lying straight behind your rifle, so as you and the rifle look like a perfectly straight line.
You and the rifle should be forming an backward " L " shape.
Such as: _|
The butt of the rifle will of course be pulled into your right shoulder. Your right arm will be running up the side the the stock opposite of you, where you thumb will rest lightly over the top of the pistol & grip fingers ever so lightly wrapped around the grip loosely.
Now, the other arm.. may be hard to explain... your left forearm, is running under the stock, & under your other forearm in the opposite direction. Your left hand ends up under the rear of the stock. Most of the time it will end up under the stock with your figers around the rear sling mount/stud.
Your left hand forms a "c" shape around a small bean bag, dirt filled sock, or heaven forbid a bonafied bench rest style rear bag which is supporting the rear of the stock. To raise your sights while looking through the scope you let pressure off the rear bag so the gun can mash down in it more. To lower the sights, you squeeze the bag with your left hand to raise the stock, thus lowering your sights.
I have no clue if this is clear to you or not!
If not send me a PM and I will send pictures!
One last illustration at the arm thing...
Hug yourself loosley... left arm under right. Now pretend your right hand is holding the pistol grip of the stock, your left hand holding the bean bag: presto- the classic "wrap around," or as I have more commonly heard it called the "cradle."
* After you familiarise yourself with this tecnigue, you will find what position is most comfortable for you. you will not end up in a perfect _| shape, but most likely you will end up lying around a 45 degree angle to your rifle.
Also know that the wrap around "cradle hold" is exactly the same off a bench rest or table. It's just that your seated off the side of the rifle & not behind it, cradling with your arms on the table.
Good shootin,
Tres