I primarily use IMR-4350 in my loads with the 220 gr RN bullet.  For what it's worth... IMR-4350 at 40 grains is as close as you're going to get to the original .30 Army loading.  H-4350 is great, but a slightly different burn rate.  The old Dupont IMR formula is pretty close to the Laflin & Rand .30 Powder formula that was used in the original Krag ammo.

I started out just plinking... and now I shoot in several matches every year with my Krag (as well as my Garand, 1903A3, and even K-31 and Arisaka rifles).  I guess it just crawled up under my skin and took root... and I Love it!!!