I have a quick question for the experts. My dad just bought a new shotgun that just came out this year. Currently there are no mass produced aftermarket chokes in existence. He can send the barrel to William at Sumtoy and have a choke created, but he's worried about turnaround time with the Alabama youth hunt quickly approaching (he's going to take one of my sons out during the youth hunt). He bought a box of Nitros (Hevi-Shot.... not the megaweights). He's decided to use the factory full that came with it, but it's laser etched into the side of the choke "No steel shot!". So he's bought several boxes of lead and copper coated lead to use instead of the Nitros. I think this turns a potential 45 yard gun into a 30 yard gun at best. So my question is, can / should he shoot the Nitro (hevi-shot) loads through the factory full? Does the Hevi Shot constitute "steel shot".
Thanks in advance for any help, it is much appreciated.