Suppressor(s): Existing atmosphere can change accuracy in a rifle?

[MarkCO]

God I wish there was a way to see through a can to watch how gases flow, compress, etc.. through the baffles in a can... especially between a short and longer suppressor.
I was thinking when the bullet leaves the barrel on its way toward the can... pressure is being built up in front of the round and when it enters the suppressor... pressure (I would think) is building up with existing higher density gases and would that actually affect the flight path of the round.....?

There is. I do this in CFD packages. When a round is fired, the column of gases in the barrel are part of the ejecta. When a HV round leaves the barrel, it is flying supersonically backwards. That is why the base of the bullet affects accuracy (specifically nutation). The suppressor strips the gases off in a more controlled manner, and sooner, thus increasing accuracy (with a good can). BUT...

You're over thinking it. Concentrate on your technique, be consistent.

This is better advice.