I agree with Waterman. If you are target shooting under maximum loads the gun may be more accurate. I for one plan on using my Krag for deer hunting. The "driftless" area of southwestern Wisconsin, where I grew up, there are brushy hollows that would suit my Krag well. With open sights and the light handling of a Krag (mine was sporterized long ago, of course) this will be an excellent choice of a game-getter. And I know that others in that area use Krag's as well. In my little hometown of Livinston there is a small gun shop that carries Krag ammo made by Wisconsin Ammo. They were out when I first inquired a few years ago as I was having difficulty finding loaded ammo anywhere for my newly aquired Krag, which is why I got the loading dies for the 30-40. I did find some Winchester ammo between Cobb and Highland, but have not shot and chronographed it with my Krag yet. It is also listed as a 2400fps plus loading with a 180 grain bullet. I'll likely hold onto those boxes and continue to reload with IMR4350 with slightly less speed.
I have too many deer rifles from flintlock to percussion to leveraction that I have gotten deer with. Now I'm ready to step-up to the 20th century and use a bolt action for deer.