If you are looking for a hardcore military simulation like ARMA or the later Sniper Elite games,

Play it on the highest difficulty setting ("Elite") to force yourself to use the wind/distance indicators properly; otherwise, the game is too easy and the flaws become more apparent.

While designed for earlier hardware, the game scales well on modern systems, allowing for high-resolution, high-FPS sniping. Windows 7, 8, 10, or 11 (64-bit).