Using crystalloid (Normal Saline or Lactated Ringers) is now out of date. It was hazardous because it diluted clotting factors.
The preferred trauma blood volume products is packed red blood cells, fresh frozen plasma, preferably 1:1. Factor 7 is also thrown in as well.
Wellll... not entirely. It depends on the level of the trauma center you go to. Way out in the sticks (or out of the country) you may be lucky to get NS or LR.