Same as Lee's Keyed slug
I bought a box of the Fed Tru-ball's to see how accurate they would be in my 20" barrel (Mossy Mariner) and they grouped 3-1/4" at 30 yds from a sand bag rest. They where about the same compared to my Lee Keyed slugs 7/8oz hand loads. The big plus with the hand loads is you can load down to velocities that are comfortable shoot and the cost is very cheep ($4.00 for 25). The Lyman sabot slug is the most accurate slug to reload for the 12 gauge, I can consistantly get 2-1/2" groups at 25 yards and 5" groups at 50 yards from a smoothbore. If you do not reload, Tru-balls or Rem 1 oz slugs from Walmar (15 pack) are the way to go.