No sweat duplicating factory ballistics with a lead bullet in a cartridge that size. Lots of tricks to allow that. A hard bullet properly lubed and fitting the throat perfectly is one way, but the hardness required won't allow for the classic mushroom expansion- one big drawback. Rather, bullets like that either pass through like a FMJ or they shatter like glass. On the other hand, one can take a soft bullet that will expand hugely, size it accordingly and paper patch it, thus allowing high velocity. (Paper patching is simply taking an undersize slug and wrapping a tough paper around it while wet, and upon drying it'll have shrunk tightly in place. The paper then acts as an insulator between the soft lead and the bore and as such denies the severe leading one would get otherwise. Overly simplified, but not rocket science. Guys have been using that trick since two centuries back.)