Yes, they are speculation.

The speed of sound in air at sea level is approximately 343 meters per second (m/s) or 768 miles per hour (mph). The speed of a typical rifle bullet, however, can range from around 600 to 1,200 m/s (1,300 to 2,700 mph).

Lag Calculation

To estimate the lag time, we can calculate the difference in distance traveled by the bullet and the sound wave during a given time interval. Let’s assume a bullet speed of 900 m/s (2,000 mph) and a sound wave speed of 343 m/s (768 mph).

For a 1-meter (3.3-foot) distance traveled by the bullet, the sound wave would lag behind by:

Δt = distance / (sound wave speed - bullet speed) = 1 m / (343 m/s - 900 m/s) ≈ 0.0035 seconds

This means that for every meter the bullet travels, the sound wave lags behind by approximately 3.5 milliseconds. As the bullet continues to travel, this lag increases proportionally.

Since we don't know the speed of the bullet, you can't even calculate when the sound passed the mic.

You are reaching - without having adequate knowledge of physics, or accurate input variables. We won't even discuss the absolutely terrible recording equipment you are using for calculating the speed of a bullet and exactly where the sound is during that bullet path. Totally dishonest.

I don't know what your agenda is, but it's not honest. Or you would have pointed all this out as potential flaws stating your theory is speculation based on lack of accurate input variables.