Other than the bolt how do the 600s series differ from the model 7?
What was needed to fit a 6mm Rem in a 600?
The actions are virtually the same except for the tang length. However this tang length difference is what creates other differences. The short tang of the 600/660 forced them to move the trigger shoe much farther forward in the trigger housing to allow for better clearances for the triggerguard and rear action screw. Next issue is the trigger being so far forward doesn't allow room for a hinged floorplate. The forward trigger is also why they used the dog leg bolt handle - to give your trigger finger better clearance.
So the main differences are: -bolt handles -bolt release -bottom metal -trigger position
