I haven't seen the video, but from what I understand the Dragunov, and presumably this Tabuk, isn't much of a sniper rifle. I believe they are only good for something like 1 MOA, so I doubt he could get away with anything further out.
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He hit at least one guy in the leg and another in the forearm.
Actually, I've heard Peter Kokalis state that the Dragunov was a mass-produced field-issued marksman rifle, not a true sniper rifle, so is it a surprise that it's not all that accurate or long-ranged? It's a sharpshooter's personal weapon intended to give a squad some punch a little distance beyond standard rifle range.