Different rounds *would* make a difference in the distance they are away from the *source of the recording* - but not that much.
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Take a look at 7.62X39.
That would be slower than all of those I listed at 2350 fps for 123 gr.
Shooter 1 would be around 460 yards and shooter 2 around 255
I didn’t take the time to do the exact math because it doesn’t matter.