I recently ordered a Silencerco Omega. I just watched a review on the Omega done by silencer shop. They showed the db numbers for all 5 shots. On every 5 shots, the first round was much louder than the next 4 shots. Is that what "first round pop" is? Is that typical for most suppressors or is the Omega lagging in that area? Another question I have is, why would they show db numbers where it is way louder at the shooters ear oppose to the muzzle?