.410 O/U choke measuremets

[jrfoxx]

I have an American Arms (Fausti Stefano Arms/Antonio Zoli) Silver I .410 O/U,
and am unable to find any markings anywhere to indicate what the choke of each barrel is. The manual, indicates no marking is "extra full choke", as a single * marking would be full.The the certificate from the (or an) Italian proof house (it's in all Italian so I'm not sure 100% what it is or says in detail, but it appears to indicate proof markings, pressures, choke requirements, etc) has no mention of "extra full", only the typical chokes up to full (again, indicated with a single *).Is there any way to measure the end of the barrel with my micrometer to find out if it is "extra full", or if I'm just not seeing the mark and it's something else.All the info I find on choke measurements is for 12ga.
I am considering selling it, and don't want to inadvertantly give someone the wrong choke info, so I just want to double check, as "extra full" is pretty uncommon even in a .410 from what I've seen.Full/full or full/mod seems WAY more common, thus likely...

Thanks.

 

[jrfoxx]

Never mind.Finally found the numbers for .410.
In fact, near the bottom of this page, it has a chart for shotgun bore, chamber, and choke measurements for 10ga thru .410 bore in case anybody else is looking/wants this info.

Mine measured about .382" at the muzzle, which is tighter than what the art lists as full, so I guess it is "extra full". Weird.I knew it existed, but never aw anything actually have any of the more unusual chokes, just the typical cylinder, improve, modified and full.Neat.
http://www.shotguncombogauge.com/multiboregauge.html