The contrarian view, one espoused by no less than the likes of Bruce Buck, is that every 1 1/8 oz 12 gauge load has a 3/4 and 7/8 oz load riding on top.

That's the heavy load view...but in my own shooting, I'm still in love with the 7/8 oz load.

A quick note on Larry's comment about Browning's old chokes being somewhat tighter, that's true. Also true that there was quite a variation in constrictions with the same marking. I have a pair of Sweet Sixteens, one made in '62 the other in '73, both factory original and marked ** (modified). The older gun has .030" choke, the newer one .015". Go figure...