Outsider’s perspective.
Suppressors slow the flow of gas out and cool it.
We know suppressors increase the pressure back in semi’s and increase the cyclic rate.
In a bolt gun that particulate and debris either goes (ETA
back in the barrel or slows and out the suppressor.
I feel like this have more to do with that than anything shaking loose.
This was readily apparent in that video.
I think the design of the suppressor and how it’s baffle stack imparts gas on the projectile is one thing. Another is what’s blowing back into the gun itself and the barrel?
I think this will be harder to discern with higher velocity cartridges and wonder if him shooting subsonic rounds exacerbated or alleviated the issue.
The evidence is irrefutable in my eyes.
Does it matter for your purposes? Probably not. Unless you’re trying to gain every competitive advantage to have smaller groupings.
Very cool find! Thanks for sharing.