Bucks, yes you can shoot High-Velocity shells through a Kicks tube. As to whether or not to try Hevi-Shot, I would also say listen to what the choke manufacturer says. The Kicks tubes are made with a very tight constriction and you will probably get poor patterns with Hevi-Shot because it seems to work best with less constriction. But every gun will have different results, so you will need to decide for yourself what to try.

Do any of you other guys have any experience with the two different constrictions that Kicks offers for Remington guns? I went to buy a new one today and they have .655 and .665 tubes. I bought the .655 but I wonder if I screwed up? I will probably use Winchester or Remington #5 or #6 Hi-Vel, but am willing to change if I can get good advice.
Thanks, Al