Ah, I understand now.  Thank you for the clarification.  My knowledge of Krags is pretty sparse, so I'm learning as I go.

I don't reload, and don't shoot often enough to make it worth the investment.  I've read about the locking lug cracking problems from overpowered cartridges.  The only 30-40 Krag that I can find locally is a few boxes at my local Sportsman's Warehouse.  These are Remington Core-Lokt 180gr rounds, loaded to 2,430fps at the muzzle.  Would these rounds be good a good choice for this rifle in this condition?  I would assume that Remington would know that most of these rounds would be used in older rifles, and would hopefully load them appropriately.