Seems tight until you look at all of the .675 chokes for the 835/935 guns.
Yes, probably too tight for full payload #4 ammo but should be pretty good with the 2 oz smaller shot like #5s.
I have quite a few boxes of those 2 1/4 oz Federal #4s, never even shot any. Always had excellent luck in my BPS with Winchesters and Remington #4s. Remingtons were always best in regular full choke.
Still looking for that .675 Hastings. Would even try something in the .680 range too.