The only game I can think of that had properly simulated bullets (speed, taking into account wind and all that shit) was Operation Flashpoint.

This game is oooold now but it was damn fun to play on a LAN back in the day. You really did have to lead your targets if they were far away by a foot or 2 in order to hit them.

Man this thread got derailed pretty fast :P 

i posted the topic when bored and didn't put too much thought into it . . .

although, just played through marcher again and i definately rate the Gauroch in both brown and white varieties - the charge attack is cool, as is summoning the waves of meat shield imps - even though they're an ammo sponge. 

have you ever shot at a moving target?
If you go hunting elk/moose over here and want to shoot, you have to do a test (every year). It consists of a few shots from 100 meters to a stationary elk picture and then if you hit all of those in the second phase the elk is moving on rails, simulating running sideways. Probably human jogging speed.
A normal high-velocity .308 hunting rifle has quite a bit of powder with a 7.62 mm bullet, and still you have to aim a lot forward, the beard of the beast to hit it's heart, that's like about half a meter (1.5 feet). An assault rifle has a much slower bullet speed so would need even more leading.
Of course if the bullet leaves at 700 m/s it takes 1/7th of a sec for the travel, so it'd be only a few frames in a video game (8 in 60 fps). And it could be discontinuous ie if you shoot at a guy who is three frames away then if he goes slightly further he is suddenly four frames away and your lead amount changes dramatically... You'd have to use some kinds of hacks where the bullet is a line of a certain length and the next frame the line moves forward it's own length.

But if you're shooting at small rc aircraft with a gun (seen this in the navy), it's remarkable how it is hard to line up the grenade stream and even then it can sort of fly between the grenades.
Of course here we are talking about bigger than personal combat distances.
But anyway it is very unhitscan-like...

This is one of my favorite topics.

And btw ricocheting isn't completely random if you've ever seen tracers been shot in the dark. 

Shammies and Vores/Shalraths

Archviles, Cacodemons, and Arachnotrons