His 7 shots in 6.8 seconds were made with the scope on the rifle.
Tim, you seem not to properly weigh the consideration of the sniper's situational awareness, even more so if you buy into the verifying sign
of awareness....that a sixth floor shooter declined the easier approach shot, before the motorcade turn. A single sniper is attempting to shoot to
death the most powerful man in the world. Not taking the shot on approach indicates awareness the target is protected by multiple
trained shooters firing from impossible to fully anticipate locations, some expected to be armed with fully automatic weapons with already
chambered rounds, sweeping the approach, high and low, literally with dozens of pairs of eyes.
I think your presentation is much more wishful than persuasive.
I know one personally, before and after the training described below, with hits in combat deployment. He worked with this.
https://en.m.wikipedia.org/wiki/M2010_Enhanced_Sniper_Riflehttp://documents.theblackvault.com/documents/fieldmanuals/FM3-05222.pdf
Special Forces Sniper Trainiing and Employment
...1-20. Past experience has shown that deploying as a sniper/observer team
significantly increases the success rate of the missions. With few exceptions,
snipers who are deployed singly have shown a marked decrease in their
effectiveness and performance almost immediately after the start of the
mission. This decrease is due to the sniper becoming overwhelmed with
concern for his security, the tasks to be accomplished, and his own emotions
(fear, loneliness). ..