Thanks, Steve. My most specific question is spelled out in an above post, but which I will reiterate in an attempt towards clarity. What becomes of the shotcup/shot relationship after it exits the GaugeMate, or other chamber length gauge reducing devices? As it goes down the bore, it would seem impossible for a 28 ga., or .410 bore, shot cup to seal the bore. And, how was the understanding of what physical shape that payload takes on arrived at?

May God bless America and those who defend her.