I have a new Affinity 3 in 20ga. After measuring the factory chokes the amount of construction seems very light. IC measures .616 Mod is .609 and Full measures .595. The "beginning" of the tubes measure between .629 and .631. Franchi says the barrel specs out at .620 +/-. Given that, my IC has .004 construction. Mod has .011. With the beginning of the chokes near .630 am I getting some jug choke effect?

At the pattern board with steel shot, the IC gives me 70% at 30 yrds with #4 and 80% with #2.

With mod at 30 yrds I get 76% with #4 and 84% with #2. With mod at 40 yrds I get 66% with #4 and 60% with #2.

Looking at your chokes, the light Mod would give more constriction than my current mod. Your mod would give me close to factory full constriction. Would this be a good way to go for steel shot? Or do you think it might be too much constriction? The factory full is not suggested with steel.

Thanks in advance