When people fire off ‘celebration’ rounds they usually are at a high apogee, close to 90 degrees. Meaning they will typically land within a small radius of the person shooting. To reach the speeds needed to penetrate the helicopters’s body the round would have had to be at a lower apogee and thus a purposely aimed shot.
Only problem with that is you can’t miss the sound from this helicopter. They would have known it was in the area.
Not everyone has the brains to put that together.
And bullets go so far, that it could have been fired a long distance from where the planes were.
When people fire off ‘celebration’ rounds they usually are at a high apogee, close to 90 degrees. Meaning they will typically land within a small radius of the person shooting. To reach the speeds needed to penetrate the helicopters’s body the round would have had to be at a lower apogee and thus a purposely aimed shot.