Question: Do the smaller gauge guns - 16, 20, 28 - require less or more choke to achieve a given pattern percentage compared to a 12 ga? I have always been told that in the case of a 20, to achieve IC pattern percentages I would need less than the .010 normally prescribed for a 12 ga., and similarly for other chokings such as MOD, FULL. One internet chart shows IC pattern percentages in the 20 can be achieved with .005-.007 constriction, yet recently a British shooting instructor/game shot well credentialed tells me exactly the opposite - that the smaller the bore diameter MORE choke is needed.
Guidance please.
