And this goes even more when wearing winter clothes, you would see no blood. Only if one is shot through face/head or other bare places.
Bullets just do not make blood "fly" all over the place.
That's only partially true if the bullet doesen't overpenetrate (IE: come out the other side), and even then, it depends on where you hit, ever seen that famous footage of a VC captive who is shot in the head by a small revolver in Nam? yeah, very bloody, fountains of the stuff infact, and no exit wound there either, but the brain is full of blood and his heart had not yet stopped beating.
And the only gun in RO2, that we know will be in at the moment, that is unlikely to overpenetrate is the Nagant M1895 revolver, all the rest of them will likely leave exit wounds, along with all the blood spatter that entails.
Ofcourse, that doesen't mean big red puffs that look like red smoke are realistic either, that's more a side effect of older games and exploding bloodpacks in movies beeing unable to simulate spatter propperly, blood doesen't so much come out as mist as it does in many small droplets (that may pool togeather as bigger drops), along with other debree like flesh, bone, cloth and bullet fragments, and it mainly comes out the back where the bullet exits (but if you hit a major arterie or organ, you'll see lots of blood on the front too, and plenty of foam if you hit a lung and the guy doesen't die instantly).
A freind of mine was really into watching all kinds of real life gore like this a while back, and he allways had to share it with me unfortunately, so i've seen my share of it, and one thing i can say of violent death as a result, is that it's really, really messy.
Thankfully the guy has straigtened out his life since then, his facination of death was getting a little creepy for a while there..