Bullets move at over 30k MPH (I gotta find my old notes for the exact number). I believe themore accurate measurement is 1500/3000 feet per second but people understand MPH better. Anyhow, it's feesable that he stopped the bullets but because he was doing two things at once (trying to get the female to shoot herself), was caught off guard and the force of the bullets caused him to stop them but not as efficiently. Instead of the bullets penetrating his flesh and killing him, the effect was as if he was wearing a bullet proof vest... Which still hurts like hell and has the force to knock people over. Hollywood/Movies have ruined that aspect of getting shot.
Let's dumb this down a bit. View telekinesis as an invisible hand that when you want to move something, picks the object up and moves it to where it needs to be. That is the most simplest way to look at TK. The most rudimentary form.
Now what happens if instead of using that "hand" to grab we just put in front of someone to block their path. A "wall" of you will.
All Sylar would have to do is have that wall in front of him. The speed/force of the bullets could explain the effect that the wall slowed the bullets down to prevent the killing effect when they struck his body.
One could argue that how could Sylar be fast enough to put said wall up, considering the speed of the bullets but Matt did "appear" first and then fire. We also can work under the assumption that to do such a thing has become instinct for Sylar as he has been using for the longest out of all the characters that we've seen thus far.
TK.
I guess you're right, I have no way of---oh wait, the post right above this quote has the answer!
kkthnxggbaibai
((I was going to respond with some dignity and grace but I'm a gamer at heart and all taunts bring that out.

))