The shooter would be prone and in the absence of tripod a solid cheek and shoulder weld and left forearm support to pull off that shot. That would bury that scope a couple inches into the eye socket. The only way to get some distance of the face away from the eyepiece and still maintain a stable shooting platform is in the seated position. Each elbow tucked in the knees.
Shoulders in alignment parallel to the rifle. Would have to have the butt of the rifle more in the chest then the shoulder to use the scope. Still would be odd even with short arms.