The only way to know is to experiment with as many different loads as you can find.
no
You will have to call Browning to find out.
Depends on what the barrel is choked.
Depends on the ammunition. Rifled 12 gauge slugs are accurate to about 150 yards
You must contact Browning for the answer so you don't void your warranty
Yes
Shooting rifled slugs is the ONLY way to shoot thru a smoothbore for deer. If you shoot sabot slugs thru a smoothbore, it will not spin and therefore not be accurate. For accuracy, the slug must spin out of the barrel. Either shoot a rifled slug thru a smooth barrel, or shoot a saboted slug thru a rifled barrel.
What it is chambered for. Shoot as many different loads and pattern.
no slugs should on be shot thru a improved cylinder shotgun. if you shoot thru any other choke it can cause the barrel to split
A rifled cannon can shoot approximatly 500 yards. The rifled cannon is a great weapon. I advise you to use it(if you have one) in a space between 600 and 700 yards.
Only if it is chambered for them. Have it examined by a good gunsmith
Yes, you can shoot rifled slugs with a Winchester 120 Ranger Youth 20 gauge, as it is designed to handle both birdshot and slugs. However, it's important to ensure that the shotgun is in good condition and that you use the appropriate type of slug recommended for your specific model. Always check the manufacturer's guidelines and local regulations before using slugs in your firearm.