If you stick with 'starting loads' when reloading and just use factory loads occasionally to get a brass base, you should be good.
  Your 'Herters' brass is probably from the 1960s or 70s (and was made by Norma, I believe).  It would be a good idea to anneal the case necks prior to reloading.  If you 'neck size' only, by backing off a Full Length Sizing Die a turn, you should get very long case life.  Krag actions can be fussy about bullet profile and over all cartridge length in regard to smooth feeding.
  Norwegian Krags of 1913 vintage had better metallurgy and heat treat than earlier Norwegian and U.S. Krags.  It's nice that your bolt number matches and your bore looks decent.  Norwegian barrels are serial numbered to the action and have a left-hand thread.
  Good Shooting!