RE: Remington 870 slugs?
My 870 21" barrel is not rifled. I use an open choke and Federal Tru-ball slugs. These give me the best accuracy. I tried several other brands but the federals shoot the best. The Remingtons shot the worst. I guess it just depands on the gun. If your barrel is rifled, you may want to try the saboted slugs. I would try several brands and see what shoots the best out of your gun. Also, 2 3/4" is plenty for deer. The 3" kick like a mule.