Hello, I'm new to H&R shotguns and I've got a question. I got a great deal on a used H&R 12 GA. shotgun that I will use for turkey hunting. I want to shoot hevi-shot out of it and want to try some different choke tubes. The shotgun came with a turkey choke tube. What type of choke tube "system" does H&R use? Can I shot hevi-shot out of a H&R turkey tube? Thanks in advance for your help.