Yes you can, I own a Remington 870 wingmaster with a 27" smoothbore barrel and it shoots rifled 1oz slugs all day, and fairly accurately. The only thing you cannot shoot through it is sabbot slugs but the nice thing about having a gun like yours is that you can go from slugs to 00 buck shot to bird shot without changing barrels. Good luck and happy shooting
with the wingmaster barrel you can only shoot lead, but if you change the barrel to a slugster you can shoot slugs and buckshot, they also have a barrel for steel shot to.
You can, but, it will not be a good thing.
Yes, but, the results will be dismal at best.
Any non rifled slug. However for best perfomance you want a "saboted" slug.
100-400 USD depending on condition.
Slugs. You CAN shoot lead bird shot in a rifled barrel but it will not give you good or consistant patterns.
no
Depends on how old the shotgun is.
a slug is normally use in a shot gun and they are not rifled a gun with a rifled barrel should shoot a Shell that is the same caliber as the gun.
Depends on the ammunition. Rifled 12 gauge slugs are accurate to about 150 yards
probably not, historicly shotguns are smoothbore if you shoot a slug, THAT would be rifled.
Best to get it checked by a competent gunsmith before firing. It might be corroded.