MasterChief: If your Krag is stretching fired cases and causing case-head separations, you might give a 'new' bolt a try. Frankly, from my experience, Krags are not prone to show problems with head-space. However, in the old days, some gunsmiths lapped the locking lug in order to get the bolt's guide rib to also bear on the receiver. If this was done to your Krag, it adds several thousandths of free travel between the barrel breech and the recessed bolt face. This is easily remedied with a new bolt.