ORIGINAL: StrutnBPS
What kind of gun? If you have screw in chokes, you need to buy the most open choke that you can for your gun. You can not just throw a slug in any barrel.
If you are going to be still hunting, I would go with a slug, but you need to MAKE SURE it is safe first. I thought about shooting a slug out of my 11-87 a couple years back out of the regular barrel. So I called Remington. They told me that it would be safe if I put the Improved choke in it and shot a certain kind of slug. I can't remember which kind of slug it was.
If you are going to shoot slugs, I would strongly suggest to save alittle bit of money and buy a slug barrel. You can buy one for Mossberg 500 and 835's pretty cheap. Also for Remington 870's pretty cheap.Other brands such as Browning or if you buy a high brand barrel like a Hastings, it will be a couple hundred dollars. With all that said, a slug barrel would give you a lot better accuracy.
DITTO! And depends in what kind of cover you are hunting.