[quote=@TheHangedMan]
Cutting a bullet, as well as an iron ball from a musket, is indeed possible - of course, having the speed to react to it is a different story, but that's not what you wanted to hear, right?

Anyway, muskets don't have the caliber to break a steel sword. Also, due to it's own velocity, the moment it comes in contact with the blade it effectively cuts itself - the blade just helps with that. As for the two pieces, because of the impact, the direction they split will go in a wide angle - where they land is unsure, but it's definitely going to be far from the one holding the sword.

I hope you don't mind my commenting, you did ask :)
[/quote]

Do you have a youtube video or something similar of a lead musket ball being cut in half six or so feet from the firer? I'm not sure if this is just conjecture or what, I did wonder if maybe the impact of the blade would have a baseball bat effect on the ball, but I think at this proximity its momentum would just carry it through regardless.

Like I said, with your character's agility (and super senses) I feel like he would have a significantly better chance of parrying the musket ball away with the flat of the blade, it's mostly just the cutting in two that wouldn't really help you in this situation.