[thehappypm]

Is it possible that this was a bullet?

A 50 cal bullet is estimated to reach 15,000 feet if fired straight up.

But this is Colorado: in the most extreme scenario, standing atop Mount Elbert, you’re already at ~15,000 feet.

Combine these two — and account for the dramatically reduced air resistance along the bullet’s path starting from high altitidue — you could conceivably get a bullet that high

Some dope standing at high elevation blasting bullets into the sky in Colorado seems as plausible as a meteor