Let's see if I'm understanding this also. What you guys are saying is that the magazine box may be too long (high) and is being pinched between the stock and the receiver. This "pinching" then causes the action not to be properly seated in the stock which affects accuracy? Removing some of the material from the bottom of the magazine box allows the action to "seat" correctly into the bedded stock and thus improving accuracy. Is this what you're referring to?