Question about the movie "SHOOTER"

At the last scenes when they meet in the glacier Mark Wahlberg snipes from a posission . I have to questions . About the first i think i know the answer .
The rifle his uses is a M24 or a remigton 700 ??? i actually think that the difference is that the m24 is army rifle and the remigton 700 is for political use . But the “big” question for me is : could the bullet that was fired to cut a guys hand ???