Postoak,
I wouldn't worry too much about the mismatched bolt.It was likely made from an old military action, and it would have been headspaced at the time. Even that wouldn't make that much difference, since you will likely have to handload for it. I have ammo and still handload for mine(I'm too cheap to shoot much factory ammo). My rifle, and the others I have "slugged" have .358" groove dia. It is worth your while to check yours before you get tangled up in trying to find .355/.356" bullets because someone says you need them.If the rifle was made before WW1, it may have a "MAUSER" action and may not have been marked as such. If you can't take it apart(serial# on back of mag box=mauser) you might be able to tell from the double set triggers.If it is a military action, the DST will be a seperate unit,let into the triggerguard assy.If it is Mauser, the triggers would be in the assy.itself.
Mike

Last edited by Der Ami; 08/04/12 03:55 PM.