I decided not to shoot it will return it.
Talked to IC today and said they check every choke on a A400 at their shop before they send it out. Also said "a few" guys have returned the A400 chokes because they fit like this must be some inconsistency in the choke bore from Beretta. When they return the chokes they fit flush in the A400 at the shop.
From a local gunsmith and IC:
Probably fine as long as it sits down on the inside of the barrel the outside is cosmetic. (Neither are paying for replacement barrel)
In my mind it's all the way down on the inside of the bore, but don't want to ruin a $500 barrel. If I have other options.
Then again who's to say a choke that fits down to the outside shoulder is all the way down on the inside bore??? I never check for that until now.