It can be done, but, it is not recommended
50-1000 USD or more depending on specifics.
Depending on what it is choked, yes. Have a gunsmith examine it.
You must follow the instructions in the owners manual or call S&W
Mossberg 1000 barrels will fit the Smith & Wesson 1000 Super 12 only !!
A shotgun.
about 1000
Yes. You will have to shoot different brands and weights to see which one(s) your shotgun prefers.
Less than 100 to over 1000 depending on specifics.
about 1000
100-1000
$650-$1000 used
100-1000 USD