“Investigators also recovered tracer rounds from Paddock’s room. Those rounds produce a flame when fired and allow the shooter to follow the bullet’s path for more precise aim”
Tracer rounds are hardly accurate enough to give precise aim.
Using a bump stock doesn't allow for precise aim -- particularly when you're shooting at something 1,500 feet away. And as you observed, the use of tracer rounds doesn't help much.
Tracers produce a flame....my ass LOL. Some experts that CNN.
Tracers are nothing more than a little painted on phosphorus ring that burns off and shows the bullets path which I am sure you already know.