Back when hevi-shot first come out, or when I first saw it and bought it, I had no clue what it was or what the difference was. When I saw 20% denser than lead, I thought it was just a silly advertisement but bought them anyways. These were my favorite shells. It was back when Remington made them, they were hard to beat.
My story is, since I was ignorant into what these really were, I shot them out of my factory remington choke, and did so for several years until I somewhere finally realized what these shot were made of, and then saw that they had specially designed chokes. I will probably not do it anymore, but as far as I know it never harmed it.
It was just a remington extra full choke made by remington. Dont remember what the exact constriction was. I shot 3" #5 or 6 shot with probably an 1-7/8 oz of shot. It was a long time ago so do not remember those specifics. You couldn't beat the patterns. ON a turkey head target I would have 40 or so pellets in the head and neck at 35 yards.