I rate AccuTip Slug the best
I too am from the Midwest and used to using a slug gun, that is why I took it to Africa. I had been Remington's core-lokt slug with good success. But the look of the Accutip made me give it a try. Right off the bat I was shooting 1" groups at 50yds and 2 1/2' groups at 125yds. The blesbok I shot was at 172 steps. They are accurate out of my 870. Here a pic of the recovered slugs from my Africa trip From the left, new slug, blesbok, impala, kudu, and bush pig. The springbok and duiker were pass thru's.
Remington AccuTip Bonded Sabot Slug