Writing in the current Shooting Sportsman, Michael McIntosh says "Shot cartridges are so efficient nowadays that choke is all but obsolete."

I've been looking unsuccessfully for a valuable thread a month or two ago of methods used by members to open chokes. the increments etc.

I'd like to send it off with a couple barrels to my gunsmith hunting buddy, and would appreciate assistance in finding that information.

The cautionary notes re POI were particularly interesting.