Anecdotally, I will add this. I own a Bruchet built Darne, circa 1997, in 20 that was built with larger than standard 20 bores, per customer order, and choked in IC and IM. I am having a devil of a time trying to find a 7/8ths production load that prints a decent pattern. Now, 1 oz loads are a different story, they all pattern as nice or better than my usual 1 oz 16 gauge load, in my usual 16 gauge gun. I am pretty close to giving up, and just calling the thing my light 16, and shooting 1 oz loads in it the rest of my life, which a poster has suggested I do.
I have no firm answers, just questions.
Best,
Ted
