Question is pretty vague but generally speaking if you have an adjustable stock you will probablyend up increasing your LOP and raising your butt pad to attain the proper eye relief and cheek/shoulder weld when in the prone position.
When I went from shooting on a bench to prone, I had to shorten the LOP. Butt and cheekpiece stayed pretty much the same.
Buy the book "The way of the Rifle". It is mainly about smallbore but position, selecting apertures and filters etc is all the same. I think the only difference would be to have more clearance to the rear sight so you don't get whacked. Good book.
When you go prone your head goes forward.
New version out and available from site sponsor http://www.nordicmarksman.com/Ways-of-the-rifle.htmlLooks like out of print![]()