I don't think the ping would do so much, playing on CIA with 300+ of ping, I headshoted 4 guys with the M21 in Fallujah, which is the most laggy map for me.
My ping is shit on CIA too, I have to use one mag to kill an enemy in average.
But It never stopped me to lase for my pilot and we always have the most kills.
Taking sniper kit all the time, took out countless ppl stay on TOW or stationary stuff.
Ping should not be a problem if you are doing the ''Less stressful'' thing.
Fun vid. Music from the Bourne series, right? Cool.
I think you were just a bit rusty on changing targets. I sometimes take the image of the indicator of an HAT kit in my head. Shifting too fast between targets wil f up the accruacy, I guess. As he becomes more steady with his gun, you can see his shots are more accurate. I'm not an epxert, but from my experienceS I have encountered that.