I've use a Kick's choke tube in my "GOLD" since day 1. On lead shot I'm shooting Winchester Supreme #5's with a Kick's 680 choke tube. Using Winchester X-Tended Range 6's and my choke is a Kick's 670.
Chuck Boswell who owns Kicks, does NOT recommond using Hevishot with his choke tubes. I would highly suggest you call Chuck and talk to him directly about shooting Hevishot through his tubes. You can reach him at 1-800-587-2779. It's always better to play it safe than sorry.