I had a Crescent 12 gauge hammer gun. It appeared to be a full choke gun in both barrels. However further barrel measurement revealed that it simply had a very tight 0.701 cylinder bores in both barrels. I figure they forgot to machine the bores to .729 after they machined the chokes. Anyhow, it was my first hammer gun, it fired terrible patterns and hopefully it's now where it belongs, in the hands of a cowboy action shooter.
Steve

Approach life like you do a yellow light - RUN IT! (Gail T.)