Most Custom rifle builders when blueprinting a Rem 700 action, they true up the receiver face, threads, and lug seats. Then the factory bolt gets face and lugs trued. If you indicate the bolt in by the firing pin hole, then the body isn`t running true. If you indicate off the body, then the firing pin hole will be off. Thats because the factory bolt is egg-shaped, undersized, and soldered pieces together. Rem cuts the bolt bore raceway around .701-.704 and the bolt is around .693-.698 and most of the time the bolt bore raceway is not the same diameter front and rear. So unless the bolt bore raceway is opened up accordingly and the bolt is sleeved or a PTG oversized bolt is used to match the action, you are only getting a partial blueprinting job. I hear all the time that their action was fully blueprinted by so and so and its as good as a custom action. It will never be as true as a custom action unless the bolt gets done the correct way (sleeved or oversized PTG style). If you don`t believe me, the next time you have barrel in lathe threaded, put action with trigger on barrel, put bolt in, put indicator on bolt and set on zero, then cock it, you will see what I`m talking about. I`m sure I will hear peoples opinions but I think everyone should know the truth.