The recoil+weapon sway in this game is the worst interpretation I've ever seen. I've been shooting and handling firearms for eleven years.Proper grip and stance will determine your muzzle rise and recoil more then the caliber will.
And for all the nay sayers here's some videos.
M60e4 Due to proper stance and grip there is barely any muzzle rise at all.
http://www.youtube.com/watch?v=ZQxIi-oaa0c
Fal 308
http://www.youtube.com/watch?v=CmJhFIPKmcc
Some others
http://www.youtube.com/watch?v=BFlQuiPLB8s Notice yaegers stance and grip compared to the other guy, and how much less recoil he has.
http://www.youtube.com/watch?v=xNNbR9pXk5E This guy has a horrible stance and grip. The second guy featured shooting is even worse, the worst thing to do is lean back while shooting.They're probably POGS.
PKM
http://www.youtube.com/watch?v=TNFmrtjvSf8
http://www.youtube.com/watch?v=xezHto1gglo