Should also mention SAAMI max is .745 for the 12 gauge therefor the Browning would still be considered a 12 gauge.

Who the hell knows what Mooseyberg considers their set up !!!

Argh!

You guys missed my point!

so was mine !!!

hmmm rethink taken on board
my rusky Bakails barrels are tighter than a tight thing and if you chop of 4" from muzzle on the full choke singles (been there done that) they still read 1/4-1/2 choke which is why they read over full as the degree of restriction is still the same as from a wider bore going to full.
and yes they do pattern plurry tightly with some loads.

I got caught up in the numbers, and fancy parts and shot guns stuff once.

Remembered what an old timer told me:

Shoot the on that fits ya best, and often. Pick a load the gun likes. Fixed over screw-in. The rest are variables, variables = missing.

He was right. That's why I carry this old thing now. Man it points, hits what I point at (incl clays) with a super slick action, fixed CYL choke, with #6 any-brand? Deadly @35y+.

IMO The biggest problem with screw chokes is they tend to be to short !!!

A longer taper would allow for a smoother transition of constriction. Thus better patterns.