Trump shot?

[JOM]

Continuing my previous post, here are two images comparing one shot from the first group (the second shot, so we don't have the Trump's voice interfering with the shot sound) with the first shot from the second group.

First group, second shot.
[Image: https://i.imgur.com/TFgtcB2.jpeg]

Second group, first shot.
[Image: https://i.imgur.com/XnEpgdW.jpeg]

As we can see they look very similar, both in the echoes and in the frequencies (seen on the spectrogram above the waveform), so I think either only one gun was used or two identical guns with identical ammunition that were close to each other.

PS: Looking at the first image we can see that the sound of the shot and consequent echoes has a duration of 0.3 seconds. The shots of the second group were fired at an interval shorter than 0.3 seconds, so we have some the end of an echo mixing with the next shot.

The friend of the dead assassin who is thought to be the 2nd shooter was from the same rifle club. That would be consistent with having a similar rifle to each other too, IMO.  It doesn't have to be so, but it would be logical to me anyway. 

I want to add, I like your graphs on here.