Mil-sim is a game type and a mindset, not a game length. Try out an 8 hour, or even an ammo restricted game. Having 7 rounds at the start of a 5 to 8 hour game makes you think about when and what you shoot.
“We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.”
To those Rough men... Thank You.