I use standard Remington Core-lokt 180gr. Not sure of its ballistic coefficient. I may have to look it up and get back to you.
However, it does fantastic out of my krag for white-tail as well as black bear.

I never shot 210 grain out of my krag, couldnt even tell you what the velocity or spin drift is with a bullet that heavy out of it. I could also find the ballistic coefficient for 210gr. as well.
If youre interested. With that information you can compare and use the right grain for the application.