You are so underwhelming with your ignorance of terminal ballistics. The Krag was replaced by the 1903 Springfield which was a much more robust design, less complicated to manufacture and could be loaded much more quickly via stripper clips. The .30-03 cartridge which replaced the .30 U.S. (.30-40 Krag) fired the same 220 grain round nose bullet at about the same velocity as the Krag which, of course, gave about the same terminal ballistics. The cartridge did not have the reach desired so was modified to become the .30-06 which fired 147-150 grain and 170 grain spire point bullets giving flatter trajectory and a greater effective range.
Until you shoot something with a Krag, hold your opinion in your pocket.
Thank you professor, for your lesson in ballistics. I did not realize that there was a doctor of ballistics among us. However, there are numerous US Army and USMC reports that it took multiple hits to stop Boxer and Filipino troops.
As for my opinion, I will express it - without your permission - as long as America is a free country. However, in the unlikely event that you are now dictator, I REFUSE.