You should see the rail-gun bench resters in the States then, they have a scope mounted on the bench and use that rather than look through the scope attached to the receiver, and then pinch the trigger.
The whole rifle is mounted on a large metal block on v-rails and is just a receiver and barrel with a small scope attached. With .22LR there is hardly any movement back along the rails as the whole thing is so heavy and no other part of the body touches the 'rifle' itself.