Has anyone taken a super accurate rifle and then purposly ground one locking lug so all the presure was on only one lug to see what the accuracy difference is?

The reason I ask is because I've hspent way to much driving lately and can't see how it makes much of a difference. Correct me if I'm wrong but the case fits prety snug in the chamber and when the round is fired the bullet travels down 20+" of barrel forcing the bullet to be true in a very snug barrel. How does a possible side movement of the case make any difference to the accuracy?