If you have not hand-loaded for the Krag before, just a bit of advice.  It is not necessary to duplicate the original loads.  The newest of these rifles is over 100 years old  and there is nothing to be gained from squeezing the highest possible velocity from them.   

You might read (at least in old Lyman manuals) about inspecting Krag bolts for cracks around the locking lugs.  They are found and it is easy to add to the number.  If you are going to shoot the old 220 grain bullets, stay away from the loads giving 2,000 fps or more.

There are several loading manuals out there with recommended loads that (IMHO) are way too hot for old Krag actions.  It is easy to pour more of a modern powder into the Krag case than the old bolt, action and barrel will take without negative consequences.

Our old Krags usually shoot quite well with loads tamed down a bit.  Lighter loads are easier on both our old rifles and our shoulders. 

There are several cast bullet designs developed with the Krag in mind.  If you have access to Phillip Sharpe (1937) "Complete Guide to Handloading", check out the section on the .30/40 Krag cartridge.  There are modern day equivalents of most of the recommended components.