With the 220 and 40.0 grains of the IMR-4350, you should be right around 2000 fps, per the original ammo.  The Hornady and Sierra bullets, although both RN have different shape/ogive.  The Hornady perform better in my Krag, while the Sierra is more accurate for others.  Try both and see which one is better for you!

As for the cracked lugs, stick with the established loads found in your standard loading manuals... and avoid the suggestions of the so called "Experts" who have that "Perfect" pet load.  If you keep the pressures below 40,000 CUP, then you should never have a problem.