Shooting bag/rifle rest?

[SDMF]

To answer prairie ghost, rifle butt firmly against shoulder because letting a 338WM get a running start is just a little less painful than doing it with a 12ga shotgun. The rifle will shoot high any time the fore end is on a firm surface, but not if even my left hand is between the fore end and the sand bag. The rolled up sleeping bag is easier.

Any chance your front sling stud is banging your front rest and bouncing the bullets high? What kind of stock, wondering if there's enough flex to be bouncing the bbl off the forend?

 

[Norske]

sling stud isn't hitting/tearing the bag, standard wood stock on a Ruger M77 MK2.