Here is a Link to a Page on Shot Placement with Graphics.....
One piece of advice i'd offer is that if its near dark and you have a close shot at a cow elk (150-200 yards) that is near the tree-line and can run into the timber after getting shot.... consider a head/neck shot.
I shot a cow elk at the end of shooting light (last 30 minutes) and punched it through both shoulders with a 200 grn Nosler Accubond... she reared up on her hind legs, and i just knew she was going to drop.... No, she ran about
200 yards!! Looked for 20 minutes in the dark, and had to recover her the next morning... cow was hit Solid through both shoulders.
Wish I had done a Head/Neck shot in that situation, I had a good rest. And if you are going to shoot for the vitals area... shoot, rack your bolt, find the elk in the scope and shoot a second shot if possible...
It would be a good idea to practice this at the Shooting Range. Shooting the first shot at a target, rack your bolt, and fire a second shot hitting the target Without Breaking your cheek- weld to the stock and looking through the scope. Do this from field positions... prone, sitting, and kneeling with shooting sticks.
This type of practice of putting two shots on Target, Quickly, will SAVE you alot of grief and tracking time!!