About the garand, there is a problem with the hitboxes right now. It is supposed to kill in one shot to the torso or the head, but since the arms are very often infront of the torso, and the hitboxes do not fit the 3D model perfectly, many times the game thinks you hit the arms, thus taking two hits to kill a guy. The DOD guys are fixing that in 1.1 by making it so that if the torso is in the path of the bullet after hitting the arm, it will regester as a torso hit, and thus kill in one hit.
I kinda wished they made the Garand fully semi-auto though.