It's as easy as falling off a bar stool to duplicate the original gov't load of 220 grain bullet/2000fps using 210-220 grain cast bullets, with a bullet soft enough to expand beautifully and not lead the bore.
Note: don't try to exceed that 220gr./ 2000fps level in a Krag. The Army tried it by increasing to 2200 fps and started getting a bunch of cracked locking lugs, whereupon they dropped back to 2000fps. It was plenty good against Spaniards and Moros, and earned a reputation for being big medicine in the game fields too.
