Those tight-as-a-frogs-a$$ chokes were designed for shells with cardboard wads that needed all the choke they could get to deliver a decent pattern at 40 yards. As far as I can see, Bob improved the chokes on his gun, at least for the upland hunting I like to do. To me overly tight chokes are a PITA, one more thing I have to spend money on to make the gun more suitable for my needs.
Good for you Bob!
Steve

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