Alan - Welcome to the KCA Forum. You have a nice looking Krag!

I have used that Remington 180 grain factory loading in several Krags without problem. I suspect many of us have, in order to get a 'Brass Base'.

U.S. companies have loaded .30-40 ammo to safe pressure levels for the Krag, knowing it was the most likely rifle it would be used in.

Original Krag military loadings used a 220 grain bullet moving at 2000 fps.

Using a lighter projectile (180 grain) allows increased velocity without higher pressures.

BTW - I have found 180 grain Remington (and Winchester) factory ammo to be quite accurate and to feed smoothly in my Krags.

'Chuck Hawks Page' states Remington and Winchester factory ammo for .30-40 has a muzzle velocity of 2430, muzzle energy of 2360, at a pressure of 40,000 CUP. Propellant and bullet profile changes have improved velocity a bit.