You must call S&W for a correct answer.
Yes, you can shoot steel shot with a Smith & Wesson Model 3000 shotgun, provided that the shotgun has a suitable choke and is in good condition. However, it's important to check the manufacturer's recommendations and ensure that the barrel is compatible with steel shot to avoid any potential damage. Always use appropriate ammunition designed for your specific shotgun model.
You should call S&W to get the correct answer from them.
The markings.
yes
500$
Best left to a trained gunsmith
I would start my search at Smith and Wesson first.
100-300 usd
50- 325 USD or so
Not recommended
You will have to find someone who specializes in air gun repair.
100-3000 depending on specifics