waterman wrote on Nov 11^th, 2011 at 4:58am:

Get or borrow several different manuals.  Older manuals may have more data on loads for the Krag rifle than newer manuals. Read them carefully, especially where they tell you what sort of test rifle was used.  Then note what starting loads are most often recommended.  Also, you might consider 4895 or 4064 or 3031 powders.

Ed, I routinely use the Hornady Reloading Manual for my load data.  I load IMR 4064 exclusively for 30-40 in my two Krags (as well as 30-06 for my Garand).  I've loaded 180 grain sp bullets for decades with great results using 38 grains of the 4064, shooting in both my 1898 rifle and my 1898 cutdown sporter.  The Hornady manual (as well as the load chart included with my Lee dies) lists several different powders, and velocity ranges for each powder.  In addition, the Hornady manual lists the max load for each powder.  Normally I stay right around the mid range (usually two below max) and do very well with it.  I no longer hunt so I don't worry about much beyond accuracy.  That said, I now load 165 grain Hornady boattail soft points with 38.6 grains of 4064 and I achieve 2-3 inch groups at 100 yards and beyond in my 1898 rifle with iron sights.  Not too bad for my bad eyes! 

I agree with what everybody else has said... stay below max loads regardless of what powder you use to be on the safe side.   8-)